FutekLogo. If desired/required by the client we can also offer an ultrasonic bolt tension measurement. If dL is the amount of stretch in the bolt at an aim The pre-tensioning process is typically achieved by using small-diameter, compact, high-psi capacity calibrated tensioners. A dissertation submitted by Brett C Taylor in fulfillment of the requirements of Courses ENG4111 and ENG4112 Research Project towards the degree of Bachelor of Engineering (Mechanical) Submitted: October 2004. Hydraulic bolt tensioning technology provides the highest level of accuracy, productivity, and safety on critical joints across the energy industry. In other words, tension is the stretch or elongation of a bolt that provides the clamping force of a joint where torque is a measure of the twisting force required to spin the nut up along the threads of a bolt. Elastic interactions can either increase or decrease bolt preload making it even more difficult to predict. snug-tightened. Machine Design Bolt Selections and Design Dimensions of standard threads (UNF/UNC) Strength specifications (grades) of bolts. 6 5. When performing the bold tightening process, you can concern the length of the bolt increase and others. INTEGRA Technologies, with our considerable field experience, is able to calculate the applied load of the first 50% of bolts so that the subsequent tightening of the second 50% of bolts results in the required residual load in all of the bolts. Hydratight BoltUp® is our free bolt load calculator, delivered over the web or available as a mobile app. lbf. allowable tension and shear loads is illustrated in Figure 5. 6 4. Increased safety Due to the purely axial bolt tensioning force applied and as the safety factors given in bolt calculation instructions come down to a minimum, bolts can be higher tensioned for the same bolt thread cross section. To calculate preload force as a percentage of yield strength, use: on the fastener which will act to increase the bolt tension and thus the preload force. The improved tensioning return of the nut will eliminate excessive and erratic bolt loads. 3 When the tension capacity of the bolt is developed, a ductile failure can be ensured by the shear friction mechanism. In this case there is no slip to consider. 7 MPa) with and effective embedment length and spacing between bolts of 6 in. This elastic stretch created by tensioning under load is permanently transferred to the anchor bolt by torquing the nut prior to removing pressure from the tensioning jack. The tensioner must pull the stud STRAIGHT. May 01, 2014 · Joint clamped together by a tightened bolt Joint Compression & Bolt Extension Forces at a bolted assembly, screwed joint mechanical engieering tension force on the bolt (Fb) is equal to the compression force on the joint (Fj), which is equivalent to the preload (Fp). 2. ITH Bolting Technology is the worldwide market leader for hydraulic, friction- and torsion-free bolt tensioning (ITH Stretch Method). Apply the torque until the face nut starts to rotate. Apart from the bolt diameter calculation for tensile application, you also need to calculate thread engagement length for the bolt. tually it is difficult to measure axial tension. The software will calculate as well as recommend bolt load / stresses for your bolted applications. As the bolt is tightened, it is stretched (preloaded). In a tapped joint, Bolt Tensioning A bolt and nut are designed to act together as the internal threaded fastener (nut) is tightened onto the externally threaded fastener (bolt). HOLLO-BOLT OPTIONS | 5 Visible protrusion: Standard Description: The Hollo-Bolt collar and head of the Grade 8. Std. 2-2 Torque and Screw (1) Relation formula between screw and torque Formula of screw ① Formula of pitch diameter of bearing surface（dn 1、dn） a: Hexagon bearing surface (first type nut, bolt) engagement, etc. 9 5. 6, 4. Bolt A commonly used equation for calculating the torque required for a specified bolt tension is given in Equation 1. Aug 18, 2019 · d – diameter of bolt (m, in) F – axial bolt force or load (N, lb) torque reduction due to lubrication (%) Note that standard dry torques are normally calculated to produce a tensile stress – or axial force or clamp load – in the bolt that equals to 70% of minimum tensile strength or 75% of proof strength. Plugging these numbers into Equation 1, we find that to produce a bolt tension of 10 kilonewtons, input torque (T I) would have to be 17. , with no tension resisted by the bolts). 4. Calculating Thermal loading Calculating initial bolt tension. DYWIDAG Post-Tensioning Systems have always combined the highest safety and reliability standards with the most economical efficiency in their research and development. In reality, there will be some loss of engagement due to the chamfering around the threaded hole in the nut. operation is a tension load in the bolt and a compression . Thus, the appropriate torque for use in the calibrated wrench installation method may be determined, or the proper tension resulting from the turn-of-nut, alternative design bolt, or direct tension indicator methods may be verified. 2 Effect of Hole Size on Bolt Tension and Installation, 176. dl = change in length of bolt (inches, m) F = applied tensile load (lb, N) L = effective length of bolt where tensile strength is applied (inches, m) E = Young's Modulus of Elasticity (psi, N/m 2) A = tensile stress area of the bolt (square inches, m 2) The Bolted Joint Analysis calculator allows for stress analysis of a bolted joint, accounting for preload, applied axial load, and applied shear load. As a guide, if the 2) Also, how does ANSYS calculate adjustment value to a given bolt pretension force? Thank you. 8, 9. 002". 1/4", and 3/8" Maxi-Bolts The 1/4", and 3/8" Maxi-Bolts are usually manually set using a hand bolt setter, and tensioned using a torque wrench. /ft. Thus, the results of the calculations of bolted joints cannot be considered as accurate and reliable. This will change with the application of an external load. 2 Bolt Tensioning Procedure – 100% Tool Coverage. K is the coefficient of friction. V-Belts. Utilize torque Equivalent Bolt Stiffness and Total Bolt Stretch Formula. : 0. K - constant. Fatigue limit in tension of the designed bolt material for the desired service life of Calculate Tension in bolt when subject to a known torque. Bolt Torque Calculation. -Ensure that the torque application is smooth and that the force causing the torque is applied through the center of the torque wrench handle. Bolts are designed to stretch just a tiny bit, and this elongation is what clamps the joint together. lbf: 34. The tensioner is clamped to the bolt’s threads and pushes against the flange in the surface being bolted. The anchor Boltup bolt load calculation software available to determine torque and tension pressures for various applications. You have your torque, but you need to confirm it for peace of Preload, torque, joint stiffness, bolt stresses, and clamped part stresses are discussed. For tie reinft, only the top most 2 or 3 layers of ties (50mm from TOC and 2x75mm after) are effective 6. Elastic interactions occur when multiple bolts are present in a bolted joint. Bolt Load Calculation Software Hydratight introduces Informate: the next generation of software that provides bolt loads and tool pressures on a huge range of flanged joints and clamped connections. Using a tape measure, measure the span length of the drive in inches. To learn the detail calculation process, go through the following video tutorial. （2） Variable Torque Coefficient. This is done because a bolt itself usually cannot handle the load weight. For a Belleville spring application, this may be 70% to 100% of the flat torque of the spring stack. This calculator is for guidance only and is used for calculating the minimum recommended bolt length based on maximum allowed thickness of the assembly components and the steelwork. 9. where 26 Aug 2015 In other words, tension is the stretch or elongation of a bolt that The relationship between Torque and tension based on the following formula:. 9 EZ Calc - Bolting Calculator, Enerteq's oline tool for estimating Required Torque Values. If you exceed the proofload value when tensioning the bolt, you run the risk of bolt failure. 8 8. STRENGTH DESIGN OF ANCHOR BOLTS pt The design provisions for anchor bolts using the strength design method is nearly identical to that used for allowable stress design, with appropriate revisions to convert the requirements to produce nominal axial tension and shear design strengths. Tension is the quickest, most dependable way to attain an even bolt preload when several bolts have to be tightened on a flange. When the working load (FA) acts on the pre-stressed bolted joint in traction manner the tension force in the bolt (FS) increases in comparison to assembly preload (FM), on Load combinations shall be per ACI 318M-14 5. Clamp load calculated as 75% of the yield strength for the B7 specified in ASTM A193. With the nut loose on the bolt, if a weight of 1 unit is added to the bracket, as shown in figure 1B, then the force in the bolt shank will increase by 1. F = tensile force , in Lbs C = TIGHTENING TORQUE, IN N*m Bolted joints are commonly used to assemble mechanical structures. Several factors affect how much tension occurs when a given amount of tightening torque is applied. Metric thread : M1, M1. 0 INTRODUCTION Connections form an important part of any structure and are designed more conservatively than members. appliedcax. 8 9. From the shear fracture model (Eq. So for this example we have to select M16 bolt. Mar 30, 2016 · Bolt tensioning works by preloading the bolt, stretching it before the nut is tightened. Tightening torque to preload a bolt Metric thread : M1 M1. 8 5. 8, 5. Calculation Example – Reinforced Concrete Column at Stress. Even if the joint slid in a joint failure, it would apply a tangential shear force to the bolt pattern, not torsion on the bolts. to contact us · Recalibration · Returns (RMA). Bolt Tensioning & Torque Specialist vacancy in Jubail, Saudi Arabia with Arabian Pipeline & Services Company (Anabeeb). 1 Fit the socket of the torque wrench to the rock bolt head or nut to be Required turn values are the same when both faces normal as well as when one face is sloped 1:20. These are significantly higher than the shear capacity of the test connection. Calculating K b and K c are relatively difficult and RECOMMENDED ASSEMBLY TORQUES SAE Grade 5 Bolts & Screws - UNF Thread Bolt Tension Recommended Corresponding to Assembly 65% of Proof Load Torque lbf lbft 2010 8 3180 17 4840 30 6560 48 8840 74 11240 105 14170 148 20600 258 28100 410 36600 610 41100 771 51600 1075 63200 1448 To convert lbf to kN: Multiply kN by 224. The number of threads per inch ( tpi) is only required if you are calculating the bolt load stress on a threaded Bolt preloading notes. The first factor is the bolt's diameter. 12. material used. 15. 01 + (36/144) = 1. Assume that a bolt has a spring rate that is 40% the rate of the joint. 1) the predicted tension capacity is 91 kips. Stress Area of the thread. 31 Jan 2017 Which is the best method for controlled tightening of a bolted joint? Bolted plays hydraulic torquing off against hydraulic bolt tensioning. A bolted assembly with or without collateral materials that is used to join two This bolt tightening method involves measuring bolt tension through things such as load indicating bolts and washers, along with techniques that calculate the length change of fasteners. 005" then the joint compression at the same load would be . 14*d*d) Or, d = 14. The plates of the connection are thus clamped together and shear transfer between the plates is achieved through friction. This calculator assumes standard bolt holes, with members stressed only in shear (i. The losses in a bolt which occur on transfer of load from a tensioning device to the bolt assembly (these may arise from phenomena such as thread deflection and embedding of the nut to the contact area of the joint, and is calculated as a factor of the length to diameter ratio of the bolt). Confirm for Peace of Mind. Torque control is done as a substitute characteristic. Figure 2-18 Takes the complexity out of bolt tightening calculation. V-belt tensioning adjustment can be made using a tensionmeter or other type spring scale, using the following procedure. Mar 13, 2016 · By pre-tension i’m assuming you mean pre-load. （2. It has been reformatted to permit ease of use while retaining the Informate Calculation Engine. 6 M2 M3 M4 M5 M6 M8 M10 M12 M14 M16 M20 M24 M30 M36 M42 - 3. tightening axial tension. 8 10. This provides a very consistent amount of stretch to the bolt, ensuring consistent bolt stretch and clamping force. 9. bolt length assumed equal total clamped plate thickness + hnut 3) Torque Tightening and Bolt PreLoad Calculation Method of torque tightening determines accuracy of bolt preload obtained. 3 4. Bolt torque can be checked with a tool such as a torque wrench, but without a value as a guideline, a torque wrench offers no advantage. The user needs to ensure there is a sufficient amount of threads available for setting and tensioning, and then use the larger of the two as the anchor's overall length. 1 in AISC 360-16), care must be taken when installing through- bolts with thin walled HSS so as to prevent distortion of the sidewalls. 7 Deutscher Stahlbau-Verband, Preliminary Directives for the Calculation, Design and. 1 17. Calculating the torque[edit]. For tie reinft, only the top most 2 or 3 layers of ties (2" from TOC and 2x3" after) are effective 6. Bolt Tension Corresponding to 65% of Proof Load Recommended Assembly Torque Diameter Thread Per Inch (TPI) lbf lbft 1/4 20 2470 10 5/16 18 4090 21 3/8 16 6040 38 Bolt Standards ASME Standards. The torque values are shown in three steps (30%, 70%, and 100%) and are only indicative, as the conditions of the specific application should be carefully evaluated. See the instructions within the documentation for more details on performing this analysis. 5) the predicted capacity is 80 kips. The acceptable rotation tolerance is ±30°. Lengthen the center distance or adjust the tensioning idler to remove any timing belt slack. This stretching/elongation is maintained by the head of the bolt and the nut on the joint thereby maintaining the joint at the desired tension (Bolt tensioning). Permissible stress = safe stress for bolt = 650 Mpa, 650 = 10/(3. Bolt Tensioning Application Sheet-BTAS). . F = % * Sy * As * 1000 (% = % of yield strength, generally 80%) C = F * µ * D = % * Sy * As * µ * D * 1000 / 12 As = stress area of bolt, in in² n = no. The flange bolt torque chart shows the recommended torque to be applied to flange bolts in ft x lbs or NM, depending on the stud bolt grade and diameter. (50. Tension is the application of force that causes stretching whereas torque causes twisting and tightening of the bolt and is an indirect indication of tension. An integrated displacement transducer even allows tensioning beyond the elastic limit. Sep 01, 2001 · F (required bolt tension) = 10 kilonewtons P = 1 millimeter µ T = 0. When the tip of the bolt shears, pull back on the wrench until the outer socket is no longer engaging the nut. This tensile force in the bolt creates a compressive force in the bolted joint known as clamp force. ○ Lubrication. If the bolt is overstretched and is loaded beyond its yield strength, the bolt will not Even with snug tight tensioning of the bolt (approximately 10% of the minimum bolt pretension (Table J3. 04. DOWNLOAD THIS PAGE AS PDF. It’s actually surprising how much weight bolts cannot handle. Record the maximum torque applied, the date of test, and the rock bolt identifications. After seating the belts in the groove and adjusting center distance so as to take up slack in the belts, further increase the tension until only a slight bow on the slack side is apparent while the drive is operating under load. It takes more force to tighten a 3/4-10 bolt than to tighten a 318-16 bolt because it is larger in diameter. But “If you have a problem flange, and it is critical that your bolt load be evenly distributed, you want tensioning” he added. Calculated Maximum Load. This is because, connections are more complex than members to analyse, and the discrepancy between analysis and actual behaviour is large. Although there is no theoretical limit to the capacity of a multistrand anchor, practical considerations such as drill hole size and the availability of material handling equipment limit the size of an anchor to 91-0. Torque and Tension in Bolts: Bolt, one of the most widely used fasteners in the industry, is usually tightened by applying torque to the head and/or nut. This equation is a function of the bolt diameter, Should a bolt load calculation be required, we require a number of details of the flanged connection, such as: Flange BOLT TENSIONING. 3. dl = change in length of bolt (inches, m) F = applied tensile load (lb, N) L = effective length of bolt where tensile strength is applied (inches, m) E = Young's Modulus of Elasticity (psi, N/m 2) A = tensile stress area of the bolt (square inches, m 2) Metric Bolt Torque Calculator. 9 ACI 318M-14 Appendix D clause 17. 7. When a sample bolt is installed in the “Skidmore,” the tension is measured on a dial gauge. ○ Machine factors of the bolted Joint. Massive mechanical effort to create torque is replaced with simple hydraulic pressure. 7854* ( D - ( 0. Calculator to provide the torque necessary to achieve psi tension in the bolt. 9 & 17. Preload is the tension created in a fastener when it is tightened. Place the timing belt on each timing belt pulley and ensure proper engagement between the timing belt pulley and timing belt teeth. Nut and Bolt Stress Calculators This is the place to find UN/Unified nut and bolt dimensions/thread dimensions/sizes and stress calculators. Veltec Koeln2 1500x430 - Tensioning & Torquing right gaskets and bolts and closing the flange connection with the correct calculated bolt strength. 01 + (Bolt Dia / Clamp Length) = 1. Jan 10, 2015 · So, minimum preload in the bolt, Fp=10 KN. The successive tensioning of the remaining bolts from the same side reduces the residual bolt load in the first 50% of bolts. For ASTM A193 B7 and ASTM A320 L7 bolting, API recognizes both % of bolt yield strength, and psi stress in bolts, as measures of flange clamping force necessary to provide a secure connection. For bolting specifications that do not have a published proofload, it is usually calculated at 92% of minimum yield strength. Flanges are Note: This calculation is meant for the design of a connection with one bolt. Hydratight can also demonstrate that the bolt load calculations it uses have been independently Bolt load calculations & Flange stress analysis; and; Bolting equipment hire. 9 rock bolt installation. The ability to perform a component level analysis on a bolt will provide the plant engineer an engineering tool to make the correct technical decision. threads / in. 4 Calculate and record the rock bolt tension or its anchor tension (see section 13). All data is per AISC 9th Edition Manual (ASD). 3. Tensile Stress Area of Bolt, often represented by A t, is a physical quantity used to measure the crirical stress area or the mimimum area of threaded section of a bolt. d - diameter of bolt (m, in) F - axial bolt force or load (N, lb) torque reduction due to lubrication (%) Note that standard dry torques are normally calculated to produce a tensile stress - or axial force or clamp load - in the bolt that equals to 70% of minimum tensile strength or 75% of proof strength. The relationship between bolt torque and its corresponding pre-load force (tension) is given in the following formula T = K Fi d. Comparison of output gained from model with a traditional calculation technique. The bolt is tightened to a deﬁ ned angle from the snug torque. ISO 4162 - Hexagon bolts with flange -- Small series -- Product grade A with driving feature of product grade B location, the bolt load can be scoped to a single body, as in Figure 2. dl = F L / E A (1) where . In my case the bolt I have used has got 550MPa min yield strength (Section II, part D), thus according to 12. For joints in which the only force is an applied tensile force in the direction of the bolt axes, the tensile force on any bolt should not exceed 0. Calculation Example – Torsional moment-Stress. 9 What is Bolt Tensioning? Tensioning is the direct axial stretching of the bolt to achieve preload. As with every bolt pretensioning method, Calibrated Wrench may only be performed after all steel plies in a connection have been drawn into firm contact, i. 12 Mar 2019 Our T works out to 93 ft lbs. Calculate the reaction module Z = I x /r max for a circular pattern using: It can be shown that [2θ j, j = 1,. 74 millimeters R B = 5. 2, M1. Bolt Properties. If you are calculating the stress on a threaded section of bolt, you will need to specify the number of threads per inch below. #Permalink; 0; 0; 0. Allowable Stress Design It can be assumed that the D + L R is the governing load combination. This head variant is the usual choice for the majority of SHS connections, or where architects favour BOLTED CONNECTIONS – I Version II 33 - 1 BOLTED CONNECTIONS – I 1. A coefficient of friction of 0. Mar 12, 2019 · The Bolt Torque Formula. Procedure 12. This fastener bolt torque calculator will Estimate the unknown torque, diameter, axial force applied and coefficient of turning friction for the given conditions. As part of our Controlled Bolting Services, we also provide bolt tensioning. Calculation Description: "BOLTGRP" is a spreadsheet program written in MS-Excel for the purpose of analysis of bolt groups usingeither the ultimate strength method (also known as "instantaneous center of rotation" method) or the "elastic" (vector) method ("Alternate Method 1" in AISC Manual). -. 3 Bolt De-Tensioning calculate the pressure at which the flange nut will break free. 008 for copper conductors Pre-Tensioning and Post-Tensioning in Prestressed Concrete Design Pre-Tensioning in Prestressed Concrete. However in general terms, the pump must be pre-set to the calculated tensioning pressure for the flange/bolt combination in question. Calculate the location of point load Shear bolt connection EC3 Torsional Moment-Stress Calculate the Axial Forces of the Truss Members Calculate the Maximum Shear Stress How to calculate yield strength Calculate angular velocity, angular acceleration Temperature Change Average shear stress in pressure vessel Allowable shear force of the girder Aug 08, 2018 · You can make use of the suggested torque value of the bolt tightening. - You can calculate the shear strength or the tensile strength of a bolt • Simple connection: If the line of action of the force acting on the connection passes through the center of gravity of the connection, then each bolt can be assumed to resist an equal share of the load. 25 millimeters α= 30 degrees. Table 1: Variation of bolt load according VDI 2230 "Systematic calculation of high duty bolted joints" Bolt yield strength is a measure of the load required to stretch the bolt to its maximum length or stretch and allow it to return to its original length. rapidly calculate bolt tightening pressures. The stud will stretch to the desired elongation, and the Nut face will move from the flange face. See also this calculator and this table As a reality check if we approximate to a cross sectional area of 7 mm 2 and a load of 1000 N that gives a tensile stress of 140 MPa which is below yield even for low tensile steels. Double Shear Bolt . Try Boltplus Bolt Load Calculation App now. com Oil Pressure Calculation Bolt Load Residual Bolt Load required when the tensioning operation is complete Tensioning Force The load that will be applied by the bolt tensioner during the tensioning operation Load Transfer Factor The ratio of Tensioning Force to Bolt Load Load Transfer Factor = Tensioning Force = 1. The bolt tension is calculated by the well known formula:. N. Current Regulation and Calculation Methods . clamping force for a joint is 20000 lbs. Accuracy and reliably is ensured because the color change of the DTI Visual Indication System™ is proportional to fastener stretch — the only true measure of how tight your joint is (torque readings can be misleading since torque only measures how difficult it is to turn the bolt head). （1. When the working load (FA) acts on the pre-stressed bolted joint in traction manner the tension force in the bolt (FS) increases in comparison to assembly preload (FM), on The bolts have an effective yield stress of 60 ksi (413. Engineered joints require the torque to be chosen to provide the correct tension preload. To arrive at the correct torque value, several other values must be found first. 28 mm. When bolts are tightened within the plastic zone, dispersion of axial tension is small and operation is easy. Metric bolt grades and strength calculator to show proof strength, tensile strength, Vickers / Brinell hardness, minimum breaking torque and stress area of metric bolts and screws made of carbon steel and alloy steel with designations 4. Inaccuracies created through friction are eliminated. 2 Aim of anchor bolt design The aim of anchor bolt design is to produce an anchor bolt connection analysis and design of adequate safety and serviceable level in its design life, both at a sufficiently and acceptably low probability of violating the limit states. 8 6. The middle of the bolt face is automatically selected for dividing Oct 11, 2000 · For cable equipped with pulling eye or pulling bolt, the formula shown below is used to calculate the maximum allowable pulling tension on the cable for the entire routing. That figure is about right for a low tensile bolt. 6 Hydraulic bolt tensioning provides a quick and easy method for tightening large diameter bolts to high and be calculated to acheive required bolt load. The calculator recommends the best torque values and bolt loads for your job as well the recommended bolting pattern based on the bolting system you are using and Tightening torque to preload a bolt Metric thread : M1 M1. e. ) (see Appendix A for calculated tensions) K = constant • 0. - Record the test data as shown on table 1, and perform calculations. In a bolted joint with a nut, as long as the bolt protrudes beyond the end of the nut then the length of thread engagement can be estimated by the nut height, hnut. bolt type tensioner used mostly in Grade 5 and B7 applications High strength bolt type tensioner used in demanding applications (Grade 8) The worlds strongest bolts made from exotic materials Bolt type tensioners that fit in a std. Anchor Capacity. 3" Color TOUCHSCREEN. The Bolted Joint Analysis calculator allows for stress analysis of a bolted joint, accounting for preload, applied axial load, and applied shear load. Learn more about tension control bolts resources, bolting resources and Direct Tension Indicators resources. Tension type joints. Torque is simply a measure of the twisting force required to spin the nut up along the threads of a bolt, whereas tension is the stretch or elongation of a bolt that provides the clamping force of a joint. From eq. Since tightening will go beyond the yield point, there is a lim itation on the threaded joint with additive load or retightening. 1, and the calculated cylinder and bolt rigidities, the nut slackness in the joint assembly, as it will take longer to tension the bolts using the (3) Bolt Load Calculations, and Pump Pressures in accordance with Aztec The bolt tension can be calculated using the Hook's law of elasticity. And the . 809 To convert lbft to Nm 1. The formula that expresses the relationship between the load in a bolt and applied torque is: T = K F d. The equations are developed to allow for the calculation of an upper torque specification limit that will result in a desired maximum equivalent stress in the bolt shank due to the tension and shear combined stresses. ASME PCC-1 - Guidelines for Pressure Boundary Bolted Flange Joint Assembly; ISO Standards. In 1979 the founder of ITH - Hans Hohmann - first introduced the bolt tensioning process to the gas and steam turbine industry. DTI (Direct Tension Indicating) SmartBolts directly correlate fastener tension with color. The capacity of a bolt is the same regardless of the number of plates being connected together. The additional force applied to the joint members by tightening a bolt can affect the amount of tension on the other previously tightened bolts. This alternative method reduces the available capacity of the bolts by the factor Q which is defined by equations 9-32, 9-33 and 9-34. Catch the sheared bolt tips to pre vent them from Sep 06, 2014 · Screenshot of Bolt Sizing Calculator I have found this calculator to be immensely helpful. • Grip is the distance frombehind the bolt head to the back of the nut or washer Itis the sum of the thicknesses of all the partsbeing joined exclusive of washers • Thread length is the threaded portion of the bolt • Boltlength is the distance frombehind the bolt head to the end of the bolt (AISC& NISD 2000) Parts of the Bolt Assembly Head Assessment of Appropriate Pressure Vessel Flange Bolt Tension by Finite Element Modelling. 9 12. tensioning bolt with wrench. Flange stress Analysis done to optimise bolt load considering flange strength wherever called for. 3, by applying Max. Determining the tensile capacity of U-bolts is important for determining the maximum loads that these bolts can handle, especially in construction and engineering applications. Bolt tensioning methods require reliable tools, which is something Maxpro has provided to a range of different industries for more than 25 years. It will quickly and accurately calculate the maximum bolt tensile load, shear load, torsion load, and the recommended tightening torque among other things for any size fastener (US customary units only). A uniform load can be applied by tensioning multiple studs simultaneously. You are then required to specify a coordinate sys-tem that defines the mesh slice plane and bolt load direction. Your cart contains 0 packages. The required torques for fastening common steel fasteners can be found in the Bolt Torque Calculator. In other words, if the bolt deflection at a given preload is . Using the bolt tensile failure model (Eq. Use to determine Torque, Bolt Load and Percent Yield of Maximum Load of Bolts. 5. 60 times the minimum bolt tension specified in AS 4100. 1 Test. Both lateral (single and double shear) and withdrawal capacities can be determined. Load combinations shall be per ACI 318-14 5. 8, 10. Nominal Bolt Diameter (in):. per/inch (Inch) TPI 0. Most accurate bolt torque calculator given its geometry and thread diameter, using vdi 2230 standard, Screw Clearance through the specific tool 3D model Bolt torque calculator metric( vdi 2230) Bolt torque calculator metric ITH Bolting Technology is a developer, producer and distributor of hydraulic bolt tensioning tools and torque wrenches for tightening and loosening bolt connections from M 16 (3/8'') and up. On the other hand, the users can utilize the best software to calculate the torque value of the bolt. Handbook of Structural Steel Connection Design and Details, Second Edition > Partially Restrained Connections For the limit state of bolt fracture without yielding of the tension flange, the design resistance per tension bolt is calculated as. Push the ejector lever to discharge the severed bolt tip. Bolt Torque Calculator - Calculate required bolt torque; Improvised Torque Wrench - Improvised torque wrench with luggage scale; ISO 724 - Metric Threads - Dimensions of metric threads according ISO 724; Lubricated Bolts and Reduced Torque - Lubrication effect on bolt tension and torque; Metric Bolts - Head and Wrench Sizes - ANSI/SO, DIN and The Connection Between Nut Torque and Bolt Tension (Why threads strip and bolts break) When a bolt and nut is tightened to draw the bolt head and nut together it stretches the shank, deforms the threads and loads the object trapped between the bolt head and nut. In this particular context, where torque is known, Provides users with a web-based approach to calculating capacities for single bolts, nails, lag screws and wood screws per the 2015 NDS. 187 R T = 2. The Official HYTORC App gives you instant access to torque charts, safety and operational videos, product manuals, service center locations and our comprehensive bolt load calculator. If you would like to specify multiple lengths and tensile stress areas, (Click here to calculate torque to achieve psi tension in the bolt) Two coefficients of friction or f factors , are recognized by API. Also there are no shear planes. The bolt is stressed up to the proofload value, and if there is no deformation, elongation, or fracture, then the bolt is deemed to have passed. 4. CLICK BELOW TO DOWNLOAD BOLTING CALCULATION CHART (ADVANCED USERS) · 40% YIELD BOLT TORQUE CHART. Bolts are tightened to the same minimum induced tension in both types of joint. Calculation Reference AISC 9th Strength of Bolted Joints Structural Steel Designer's Handbook tensile strength of the bolt in kgf/mm 2 and the second number, y, indicates one-tenth of the ratio of the yield stress to ultimate stress, expressed as a percentage. 1. A Bolt in Tension. 8 x 817 = 298858N LTF= 1. It cannot be cocked. 00. counterbore of socket head capscrews These nuts relieve the stress concentration on high strength bolts Stud Threads Dia. The preload is the tightening of a fastener to its maximum tension before the full load is placed on the material. Pre-tensioning is accomplished by stressing wires or strands, called tendons, to predetermined amount by stretching them between two anchorages prior to placing concrete as shown in fig. 8 bolt are evident above the surface of the steel section. Calculator to provide the torque necessary to achieve a % of bolt yield. On average, the tensile capacity is about 35% higher than the shear capacity. 05 . Figure 2-17 - Equivalent (Von Mises) stress resulting from bolt tension and torsion (SKF, 2001) 13. 6, M2, M3, M4, M5, M6, M8, M10, M12, M14, M16, M20, M24, M30, M36, M42. Minimum three (3) inputs are required then select "Find" button to get unknown. Support keyboard_arrow_right Bolt Torque Calculator its calculations; delivering world-leading tensioning solutions. High-Strength Bolt. 5 Torque Application. 8 mm). 9 ACI 318-14 clause 17. The basic formula T = K x D x P Tensioning can be done using detachable Bolt Tensioners or Hydraulic Nuts. -Determine the tension in a rock bolt or its anchor. The bolt is forced to stretch and elongate. , reductions in capacity are possible when bolt spacing is less than optimal). • Tension equal to 70% of the minimum tensile strength of the bolt • Purpose of tensioning is to achieve the clamping force between connected parts. that there is no universally accepted calculation model for bolted joints the most often used recommendation in industrial calculations is the VDI 2230 [2, 3, 4]. Bolt stretching according Hook's Law can be calculated as. 67 Services provided by Bolt Tensioning department of SKF. The number of thread pitch if only required if you are calculating the bolt load stress on a threaded section of bolt. Bolted joints are often tightened to 75% to 80% of bolt proof load. 9 and 12. Dec 14, 2009 · The only torsional stresses that should occur in the bolts will be when you torque it down. The party responsible to ensure that the contractor has satisfied the provisions of this Specification in the work. Calculation Example – Cantilever Beam with uniform loading. 9 and 17. Boltplus Bolt Load Calculation App will assist you in selecting the right hydraulic bolt tensioning tool for your standard flange application, or enquire for specialized tooling. Formula to calculate tensile stress area of bolt Bolt Diameter = 30 mm Bolt Grade = 4. Bolt Tensioning A bolt and nut are designed to act together as the internal threaded fastener (nut) is tightened onto the externally threaded fastener (bolt). The Bolt Data worksheet contains 2 pages of data tables for bolt allowable tension and shear forces, bolt length determination, bolt hole dimensions, and minimum edge distances. This can be done through the default global or user-defined Figure 1. for 1/2" bolt with hex nut as the turning element Note: The following calculations are based on 1/2" dia. They are of two types, metric flange bolts and metric hex bolts. Calculating the tensile capacity of a U-bolt requires a bit of knowledge about the structural properties of the U-bolt material and some simple mathematics. Our unique verifID total bolting software system provides Bolt Stress, Flange Stress, Tightening Torque, Tensioner Pressure and Gasket Seating Stress calculations for Mills, Pressure Vessels, Heat Exchangers, Slew Ring Bearings, Cylinder Heads, Structural Beams and Turbines. 2) ==== Using the "Tommy Bars" insertinto the Tensioner socket provided and Tighten the nut (clock-wise) to meet the flange face. T m = K x n x CMA (Formula 1) Where:T m = maximum pulling tension (lbs. Jan 28, 2019 · Hydraulic bolt tensioning essentially induces a predetermined axial load into the bolt or stud. Calculation Example – Calculate tension force using virtual work. You can consider several factors when it comes to the torque calculation. （1） Formula of torque coefficient. However, if the nut is now tightened and the weight applied, the force in the bolt shank will not increase by 1 but usually by only a small fraction of this amount. An ASTM A325 or A490 bolt, an ASTM F1852 twist-off-type tension-control bolt or an alternative-design fastener that meets the requirements in Section 2. Stiffness. This load is commonly called the applied load and is calculated to make sure that the bolt (stud) retains the desired residual load. Your coefficient will depend on the material of your bolt/nut, the type of lubrication (or, rarely, the lack of lubrication) and the size of the bolt. 500 13 5,676 27 45 7,450 35 59 ── ── ── 0. Wood-to-wood, wood-to-concrete, and wood-to-steel connections are possible. the bolt reaches the required tension. 9743/n ))² D = bolt diameter, in in. - Bolts can fail in shear or in tension. Oct 11, 2000 · Generally, the tension of a cable immediately as it leaves a bend must not be greater than 300 times the bend radius (in feet), and the maximum sidewall pressure must not exceed 300 lbs. 2 µ B = 0. Beveled washers are required when either steel ply is sloped 1:20 Max when using ASTM A490 and A490M bolts. 2 Record. strands in most cases. Bolt capacity is based on the smaller of bolt shear and material bearing capacities, and, if desired, is adjusted based on bolt spacing (i. 6. CALIBRATED WRENCH BOLTING METHOD AISC & RCSC Calibrated Wrench or Torque Installation. Load loss is accounted for in calculation and is added to the preload value to This fastener bolt torque calculator will Estimate the unknown torque, diameter, Bolt Preload Tension Equation and Calculator · Torque vs Tension Bolts Table Torque Tension Calculator. Inspector. What is Bolt Tensioning Tensioning is the direct axial stretching of the bolt to achieve preload. Search for more Bolt Tensioning & Torque Specialist jobs in Jubail, Saudi Arabia and other Middle East countries. Clampload is only a estimated number, there maybe situations where the engineer calls for the bolts to be tensioned to a different value. 625 11 9,040 52 88 11,865 68 115 ── ── ── 0. ft. Bolt Strength by Prying Effects Factor Q check-box on the Solution tab of the (Global) Model Settings. 6" (15. the fasteners, the bolt shank and threaded section are stressed in tension and additionally in shear due to the applied torque. On the go? Download our Bolt Load Calculator app instead. Joint. Note: Breaking torque test applies to bolts and screws with thread less than M3 for which no breaking and proof loads are indicated in ISO 898-1, as well as to short bolts and screws with nominal diameters 3 mm to 10 mm which cannot be subjected to a tensile test. 2 mm) dia. A plot of load versus deflection for a bolt is shown at the upper left portion of Figure 5. This stretching/elongation is maintained by the head of the bolt and the nut on the joint thereby maintaining the joint at the Try our free and simple bolt load calculator to approximate your bolt stress at installation. Our calculation engineers take a close look at your individual flange geometries, bolts, sealings and mechanical, thermal and chemical loads and propose the 6. Bolts that are fully or partially threaded, with washers and nuts are called as metric bolts. 3 In this paper, anchor bolt design ductility is assured by causing a failure mechanism that is controlled by yielding of the anchor bolt steel, rather than brittle tensile failure of concrete. Friction varies too much, bolt to bolt, Not fooled by friction variations, Using lubrication still leaves large friction variations, Avoid flange leaks, Mar 12, 2019 · The Bolt Torque Formula. Whether you tension one bolt or several bolts at a time, our hydraulic nut produces uniform compression of casings, flanges, bearing housings or connection rods. • Recommendation of required bolt tension to effectively seal flanged joint. Two principles influence the correct clamping pressure for each bolt, known as clamp load. Force Calculations for Bolted Joints. Calculation Example – Calculate shear stress for temperature load. totaling $0. The multi-bolt tensioning serves to shorten assembly and/or maintenance time. 01 + Bolt Diameter strength bolts. (4. It is not unusual to increase bolt size because the torque tightening method cannot guarentee a minimum preload. To do this proceed as 30 Mar 2016 This inherent bolt spring tension causes the clamping force and together with the friction in the bolt's threads, work to prevent loosening. 2 M1. Norbar logo. bolt Determine Torque vs. 25 Nov 2014 100% tensioning, bolt-to-bolt mechanical interaction during assembly Then using Eq. Shown below are formulas to calculate the maximum allowable tension at a bend and the actual sidewall pressure. The torque required for a 3/4" dry steel bolt to achieve this tension can be calculated as. Preliminary Directives for the Calculation, Design and Assembly of Non-Slip Adviser and Controller software programs enable the users to calculate optimum bolt load for any given application or tooling (torque/tension); will prepare and BOLT PATTERNS. Calculations. H The BoltSafe sensor Calculate the maximum tension load on the bolts given the external load. 26 % Yield Check = (Reqd Bolt Stress / Bolt Yield Strength) x LTF x 100 ENTER BOLT TORQUE: Enter the aim bolt torque. 3 Joint 1. Tension Relationship major_diameter bolt 1 i in psi lb in in ksi psi 1000 minor_diameter bolt 2 i in dm is the effective contact diameter for the threads and is the average of major and minor diameters; It The Bolt Torque Table below provides information such as tension, torque, TPI for the heavy structured bolts against its corresponding bolt sizes (ranging from 1/2 to 1 1/2). You can apply the torque to the bolt head. The amount of force on a fastener is called as torque. All calculators are approximations for general purpose use only and are not to be used for high degree of accuracy purposes. ASTM A325 is an ASTM (American Society of the International Association for Testing and Materials) International standard for heavy hex structural bolts. 750 10 13,378 90 153 17,559 118 200 ── ── ── Bolt Planet. Calculate Tension in bolt when subject to a known torque Calculate max stress in bolt when subject to a pre-load and determine its acceptability Andrews Fasteners Bolt Length Calculator EN 14399 Pre-load bolt assemblies (HR) HR Bolt to EN 14399-3:2015 / HR Countersunk bolt EN 14399-7:2007. In this test, the bolt load is calculated from the tensile strength of the material, and the Tensile. The rotation of a bolt (torque) at some point causes it to stretch (tension). In a tapped joint, A uniform circular bolt pattern has equally spaced bolts. 1 Apr 2019 it is broken in tension. The torque values can only be achieved if nut (or tapped hole) has a proof load greater than or equal to the bolt's minimum ultimate tensile strength. Calculation Example – Calculate the moments of inertia Ix and Iy. m. and bar post-tensioning (bonded, unbonded and external) as well as stay-cables being able to fully serve the post-tensioning construction industry. 11. Calculated Maximum Torque. 1 target prestress clause I should obtain the target torque value for coated bolt from the table 1M with a modifing factor of 550/345. Aug 27, 2016 · Bolts are tightened such that a high tension, usually above yield strength, is developed in the bolts, these are called preloaded bolts. The mechanics of a bolt in tension are less complicated than for a bolt in shear. 8. Here, tension capacity is taken as 200 kN. Anchor reinft strength is used to replace concrete tension / shear breakout strength as per 17. TurnaSure bolting technology presents the bolting methods that include turn of nut, twist-off bolt, direct tension indicator method and calibrated wrench method. kN: 0. You may choose between torque or tension as your tightening method and all calculations include hydraulic tool pressures based on tool selection. F = Preload Tension Force A t = Tensile Shear Area of Bolt S p = Proof Load of Bolt (or some percentage less than 100% of yield load of bolt, typically 85 % of yield S y ) Bolt Tensile Stress Area = 817mm2 (Taken from above table) Tool Hydraulic Pressure Area = 2955mm2 (Taken from the tool) Required Bolt Load = Reqd Bolt Stress x Tensile Stress Area = 365. 16 Nov 2009 Schaaf GmbH Hydraulic Bolt Tensioning Technology Calculation base Torqueing methods lose a lot of torque for overcoming friction inside SPX FLOW Bolting Systems is a full-service global manufacturer of controlled bolting solutions, including hydraulic torque and tensioning systems, Achieve better control of bolt tension and applied torque in the assembly operations. Welcome to BoltUp. Clamping forces The bolt force is e b c b b i k k F k F F Where K b and K C are the bolt and the clamping material stiffness and F i is the initial bolt tensioning. See the reference section for details on the methodology and the equations used. Bolt Stress (lb/in2):. The appropriate Q equation is dependent on the value of α’ which is calculated in the Bolt Prying section. Modelling bolts for three-dimensional finite element applications has always been a tricky proposition because the details of bolt geometric features usually result in large model size and high computational cost. When the proper bolt tension is reached, the tip of the bolt will shear. 7 newton-meters. Lubrication : NL = Non-lubricated L = Lubricated or New As = 0. Informate’s bolt load values are independently verified to ensure leak-free joints, every time. 6 Dimension of end plate = 230 x 150 mm Thickness of T-flange = 32 mm The connection will not collapse if the tension capacity is higher than total load. The software Recommended Tentec tensioning tool to use. 5. 13 approximates the friction with threads and nut bearing surfaces being bare metal, or plated, and well-lubricated with thread compound tested in accordance with API RP 5A3 / ISO 13678. Once the bolt pattern is torqued, an applied moment on that bolt pattern should be absorbed by the friction in the joint. A study on the tightening characteristics of bolt-nut-washer assemblies was undertaken of factors, and recording nut-tightening torque, bolt torque and tension. 3/4 turn to be applied to all instances, when both faces sloped 1:20. Calculate required bolt torque. 8, 8. Boltplus Bolt Load Calculation is a free app and what makes it different from similar apps on the market is the speed, ease This is done to allow a safety buffer so that the bolt does not get too close to the proofload value. The law states that the stress produced in the bolt body by the preload is proportional to the The best method is the bolt tensioning, followed by the strain The 5000 Nm torque spec was calculated by an engineer after he had Tagging of flanges and bolts with specifications and bolt torque/tension calculator ; Anomaly and close-out recording; Leak testing specification; Configuration to The tension on a fastener for a given preload and external load is: Pt = Pi = Pe(Ks /(Ks + Kc)) The total tensile stress felt by the bolt is: St= Pt/2A + ((Pt/2A)2 Tightening torque to preload a bolt. Calculate max Calculate factor of safety against stripping failure for a known thread engagement . bearing surfaces, require less rotational force (torque) to stretch (tension) a bolt than do softer, rougher, and stickier surfaces. Measures tension not torque, Patented whole echo method, Graphs tension changes in real-time, Instrument is built into the PC, 13. bolt tensioning calculation

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