Bolt size calculation online.
Jul 27, 2024 · Fast real time calculation.
Bolt size calculation online Inch Size UN External Screw Threads Formulas and Calculator per. The formulas below are for inch screw threads are based on those listed in ASME B1. D t = 24 - 0. Flange connection type. Spade/Blank Thickness Calculator - ASME 150 Series B SPWD Gaskets; Spade/Blank Thickness Calculator - ASME 2500 RTJ Gaskets; Spade/Blank Thickness Calculator - ASME 1500 RTJ Gaskets; Spade/Blank Thickness Calculator - ASME 900 RTJ Gaskets; Spade/Blank Thickness Calculator - ASME 300-600 RTJ Gaskets; Spade/Blank Thickness Calculator - ASME 150 1) Enter thread diameter nominal value in section Thread Size. Conversely, if insufficient stresses are applied during installation, the flange could become loose over time due to material relaxation and ultimately leak. 19. Related Post(s) Oct 6, 2024 · Bolt Size Calculation. Which dimension and strength should a bolt have for my application? Estimate the required diameter and property class. From eq. 315″) thread with a pitch of 0. A bolted joint connects two structural elements using a bolt and a nut. ASDIP free online base plate and anchorage calculator allows you to check the maximum bearing pressure on the support, the tension and shear forces per anchor rod, as well as design of biaxial base plates. It is intended that the bolt will be tightened using a torque wrench. Total stiffness of all compressive loadpath elements under bolt 6) Calculate Basic Joint Forces Force in bolt when preload is lost (joint separates and contact force between clamped plates = 0) Fbreak/Fleak: resulting safety factor 7) Calculate bolt loads for a particular external load applied to the joint External load applied to the bolted joint Oct 6, 2024 · Bolt Size Calculation. 1, Unified Inch Screw Threads. 1/4" Calculation of fits and tolerances for shaft and hole per ISO 286-1 and ANSI B4. Stress visualization of the base plate (FEM calculation). where: T T T is the torque applied by the wrench to tighten the bolt (N⋅m or lbf⋅ft);; K K K is a constant factor that takes into account bolt material and size;; F F F is the clamping force the bolt applies to the surfaces being bolted (N or lbf); Bolt Torque Calculator. 6, 4. 7/8" 2" 2. pdf), Text File (. The shaft is under the action of torque T. PSV Nozzle Thickness. See the reference section for details on the methodology and the equations used. Explanation Calculation Example: The bolt size calculation is an important aspect of mechanical engineering design. We choose a safety factor of 4 with a shear strength of 550 MPa for grade 8 bolt. 5. 9 and 12. Exact weight may depend on other factors. Metric Threads Per ISO 68-1, ISO 261, and UN thread chart and calculator Clearance hole calculator; Clearance hole chart; Tap drill size calculator; Counterbore hole dimensions calculator; Roll form tap drill calculator; Bolt torque calculator; Bolt torque calculation formula; Unified miniature screw thread; UN thread calculator; Unified thread standard; UNC thread chart; UNF thread chart Bolt clamping force is an essential factor in the design of bolted joints. For internal threads see: Screw Threads Calculator for Internal Unified Inch Screw Design aid - Table of design properties for individual metric hexagonal bolts including stress area, yield strength, ultimate strength, shear resistance, tensile resistance, interaction between shear and tension, bearing resistance, punching shear resistance According to: EN 1993-1-8:2005 Section 3. Tolerance class can be selected among the alternatives 6e, 6f, 6g and 4h for bolts and 5H, 6H, 7H and 6G for nuts. Bolt Torque Calculation Formula. Bolt and Nut Load Calculation: Ensures compatibility and load handling between the bolt and nut. All tensile forces try to stretch and/or separate the joint. This calculator is for guidance only. For example, M8 X 0. Gasket Thickness. For example for a M24 bolt with a 3 mm pitch. This calculator provides the calculation of bolt size and the number of bolts required for a given application. 0 Pe [psi] - external operating pressure 25 Material Properties: 26 NonCast CastMaterial? - Cast Or NonCast Details of the Bolts Used and Bolt Configuration. Only use this if you know about the hex bolts' sizes. 938194 * p. In the event your use of this calculator results in the need for servicing, repair or correction of equipment or data, you assume any costs or expense for such needs. thick washers and cleaned threads. Oct 3, 2024 · Bolt length calculation is a critical step in ensuring the reliability and safety of bolted joints, especially in construction, manufacturing, and mechanical applications. Free Steel Bolt Group Analysis Calculator. Some of the key features of the calculator are summarized as follows: - Valid for Unified inch screws threads in the size range from ¼ in to 1 ½ in and covers standard series of UNC, UNF and UNEF - Material database for steel bolts Mechanical Calculators: Estimation of Bolt Size and Property Class, Disc Spring Calculator, Cost Savings Calculator, Thread Engagement Length Calculator, Torque and Preload with nut factor (imperial system), Torque and Preload with Nut Factor and Tool Accuracy (imperial system), Torque and Preload with Nut Factor and Tool Accuracy (metric Bolts and Screws. Calculation - Bolt Size - Free download as Excel Spreadsheet (. Use this online MS Bolt Weight Calculator with or without Nut and Washer. 75 mm (0. Free Base Plate Shear Lug Calculation Andrews Fasteners Bolt Length Calculator for BS EN 14399 High-strength structural bolting assemblies for preloading (System HR) HR Bolt to EN 14399-3:2015 / HR Countersunk bolt EN 14399-7:2018. Free and easy to use calculator for the analysis of numerous steel bolts, considering in-plane shear and moment loads. Bolt Size (mm) A325M Bolts. UNC – Coarse pitch thread. 01 meters (or 10 millimeters) and a shear stress (τ) of 10,000 Pascals. 19 2 / 4 Flange Calculation. - Density is the material density of the fastener. We can then calculate the area of the bolt using the formula for the area of a circle as: 3. thick washers. 1/4" 1. , a beam with a fixed boundary condition at one end and a guided boundary condition at the other end). New Xylan 1052 (zinc-chloride plate) coated steel bolts and nuts without 1/4 in. We can calculate the minimum required bolt Torque calculations are based on the simplified formula explained in the current version of ASME PCC-1, Appendix K. General Inputs. Working of a Bolt Length Calculator. Note: This calculator initially assumes dry and perfect threads made from steel and/or zinc plated. e. 8, 5. Home; About; Products. This calculation considers various factors such as the applied load, bolt diameter, yield strength, ultimate tensile strength, and spacing between bolts. Bolt Size and Selection Calculation. QCTP Set easily mounts to 7x10, 7x12, 7x14, 7x16 lathes; 3/8" indexable TCMT inserts, P1N cut-off blade; 9-piece carbide boring bar set - 3/8" shank Now it is easy to calculate the exact weight of Mild Steel Nut Bolt in in kg/lbs. 1/4 - 20). Dec 8, 2019 · Theoretical Machinist. Free Online Steel Connection Design Calculator for help with solving shear and moment connection design calculations using bolted or welded configurations. As gasket load requirements for standard flanges generally fall within the mid-range of the bolt loads, gasket stress has not been used to calculate torque values. Sum of Horizontal Shear Forces on the Bolt, Ht: The sum of all the horizontal shear forces on the bolt farthest from the centroid of the bolt group. Sep 6, 2014 · 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). Thread type. Explanation The Lug Analysis calculator allows for analysis of lifting lugs under axial, transverse, or oblique loading. What size of bolt is needed? Solution Note: P - Pitch, d 2 - Pitch diameter of the bolt thread, d 0 - Diameter at the relevant smallest cross section, d h - hole diameter of clamped parts, s- Width across flats, μ Gmin-Coefficient of friction in the thread, μ Kmin-Coefficient of friction in the head bearing area, R p0. Mechanical Calculators: Estimation of Bolt Size and Property Class, Disc Spring Calculator, Cost Savings Calculator, Thread Engagement Length Calculator, Torque and Preload with nut factor (imperial system), Torque and Preload with Nut Factor and Tool Accuracy (imperial system), Torque and Preload with Nut Factor and Tool Accuracy (metric The Bolt Torque & Preload calculator can be used to calculate the torque required to achieve the desired preload on a bolted joint. 1/4" 2. Based on ISO 965-1:1998, ISO 68-1:1998 and ASME B1. 3) This calculator may be used with any consistent units, e. As a result of calculations, the optimal bolt diameter d calc is determined on the basis of the condition of equal strength of the bolts and the shaft. Bolt Size Calculator. 3/4" 1. Oct 19, 2024 · Bolt Size Calculations in Civil Engineering 19 Oct 2024 Tags: Mechanical Design Machine Design Bolts Bolt size and selection calculation. Calculation Example: Bolt size calculation is an important aspect of mechanical engineering and structural analysis. Bolt Circle Load Calculator: Ensures even load distribution across bolt circles, such as flanges In general engineering use, calculations can be done by selecting a standard metric thread size in a range from 1. Apr 25, 2023 · Appendix 2 provides design rules for custom flanges and flanged fittings, which can be used to determine the thickness, bolt size, and gasket dimensions for the flange, considering the pressure-temperature rating and allowable stress values. 2) Select associated lower button to calculate unknown value. Jul 9, 2022 · This bolt torque calculator will help you know how much bolt torque to apply to your threaded fasteners to achieve a specified clamping force when fastening two or more materials together. Metric . torque = ft-lbs with ft, in-lbs with inches, N-mm with mm. ) Reinforcement bar area by number and size (metric) Free calculation, no login required. From there, we can already calculate our bolt's basic pitch diameter, as shown below: Apr 12, 2024 · Easily calculate bolt thread dimensions with our Bolt Thread NPT, etc. Jan 26, 2024 · Suppose we have a bolt with a diameter (D) of 0. Using the provided formula, we can calculate the cross-sectional area (A) of the bolt as follows: Sep 7, 2024 · This calculation is important for structural safety and efficiency, as it helps engineers select the right bolt size and strength for the job. Torque is a measure of the conversion of linear force to rotational force at a distance from the axis of rotation. 28 mm. Column base plate and bolt size calculation (Eurocode 3) metric EC3 baseplate bolt steel Open calculation sheet Preview. 1/2" 2. g. 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. 0 Nbolt - number of bolts 21 Operating Conditions: 22 0. See the instructions within the documentation for more details on performing this analysis. Shear Stress Equation Single Shear. This calculator calculates required length of machine bolts and stud bolts as per Annexure D of ASME B16. Threads Unified Imperial; Threads Metric: M Profile; Bolt hole circle; Tap Drill Size The Bolt Torque Calculator uses advanced formulas to compute the required torque based on several factors: Bolt size and material. If this proves too arduous for your flange, you could increase its thickness (t), reduce the allowable bolt stress or (slightly) reduce the bolt size. 2-0,2% proof stress of the bolt according to DIN EN ISO 898-1, D Km-Effective diameter for the friction moment . Perfect for planners and architects. com Jul 30, 2023 · A Bolt Length Calculator simplifies the complex task of finding the right length, allowing professionals and DIY enthusiasts to quickly compute the size they need. = 4F/( π d 2). We know that our bolt has a 30-mm basic major diameter and a 2-mm thread pitch given the thread callout. 75 means an 8 mm (0. ASME SEC. 6) to 64 mm (M64). d - diameter of bolt (m, ft) F - axial bolt force or load (N, lb f) New Xylan 1014 (manganese-phosphate plate) coated steel bolts and nuts without 1/4 in. Used steel bolts and nuts with 1/4 in. Having quick and easy answers is important for structural engineers to do their jobs effectively. Adding to SkyCiv's already list of free tools is the new Base Plate Calculator for AISC 360, AS4100 and EN2 design standards. 2. UNF – Fine pitch thread. 03″ or 34 TPI). There are numerous "real world" complications. 0 P [psi] - internal operating pressure 24 0. Shear Stress Average = Applied Force / Area or Shear Stress ave. Feb 13, 2015 · NOTE: The size of the hexagon of a bolt or nut has no relevance when defining a thread size. It involves determining the appropriate size and number of bolts required to Aug 21, 2023 · Calculate bolt pattern size with our free online bolt pattern calculator. Unified Inch Screw Threads Calculator for UN Threads. #metricbolt#boltsizecalculation#BoltSizeMastery#BoltCalculationDemystified #MetricBoltSpecs #SizeCalculationRevealed #BoltSizingMadeEasy🔩 Unleash Your Inner Jun 22, 2024 · Popularity: ⭐⭐⭐ Bolt Size Calculation This calculator provides the calculation of bolt size based on load using basic mechanical engineering formulas. Available in many languages. In the early stages of product design? Bossard Expert Design can support and give you the advantage in developing your product. Where: Calculate bolt pretension from screw parameter Submitted By: johndoyle-admin. 8, 9. Learn how to calculate bolt pattern and true position. = F/( π r 2) or Shear Stress ave. The shear stress τ in the bolts is determined. Design Loads (Moment, Shear, and Axial). - L is the length of the bolt or screw. This easy-to-use calculator will display the plate checks required for column base plate anchor bolt design. High strength bolt preload calculation, bolt tightening torque values (Eurocode 3 and EN1090-2) metric EC3 EN1090-2 bolt preloading torque Open calculation sheet Preview A web-based app to find fastener measurements easily for bolted joint design. Desired preload (axial force). 000 Corr [in] - corrosion allowance 23 100. The flange calculator includes a database of 600; API, ANSI, BS and MSS standard pipeline and piping flanges ranging from ½ inch to 48 inch and an independent calculation facility according to ASME VIII. The calculator is generic an can used for imperial and metric units as long as the use of units are consistent. Bossard calculators and converters are designed for engineers, technicians, designers and students involved in the development and assembly of bolted joint. Our calculator is designed for precision and ease of use, allowing users to input their specifications and get accurate torque values instantly Apr 12, 2015 · The diameter of the holes that are equally distributed around the bolt circle diameter Bolt circle diameter: the diameter of the circle on which the holes will be evenly distributed. 3, by applying Max. 1 standard. The formula Oct 2, 2024 · Tags: Calculations Explanation Concepts bolt size calculator. Jul 27, 2024 · Fast real time calculation. 22 Jun 2007 . The tension load, no matter how small, will add to the stress in the bolt and/or partially relieve the joint. High strength bolt preload calculation, bolt tightening torque values Oct 3, 2024 · Finally, the torque or clamping force to be applied to the bolt needs to be provided before running the bolt calculation. 14 * 21. 14*d*d) Or, d = 14. Rating: 11 Details . Actual weight values may vary from those provided here and, though we try to make the values as accurate as possible, Portland Bolt makes no claims about accuracy and accepts no liability resulting from the use of the values provided on this page. This tool is intended for use by builders/designers who are experienced and familiar with bolt design calculations. This tool helps engineers, construction professionals, and DIY enthusiasts ascertain the resilience of bolts used in various applications, ensuring structural integrity and safety. 000 BoltOD [in] - bolt size 20 16. 2) In section Head Size and Type either select one fastener ISO with the "Select Standard for Type" option or enter manually the type and whether the fastener is socket or not in the right part of the page, once you have selected Custom option. For a given flange size and PN rating, EN 10921 specifies the required number of bolts and the bolt circle diameter. 9. 4. This calculator utilizes the formula d = √(4 Disclaimer: Keep in mind this bolt weight calculator provides an approximate weight. A Bolt Length Calculator operates based on a defined formula. Consider the Friction Factor: Friction between the bolt and the mating surfaces affects the torque required to achieve the desired preload. In the model below, the left end of the bolt is fixed (all degrees of freedom fixed) and the right end is guided (rotation and x-translation are fixed, but free to translate in y). 5/8" 1. To find the fastener standard you need, select the ISO standard (ISO 4014, ISO 4017, ISO 4035, ISO 4762), bolt size and screw length. 6g and 6H are default values and selected class for commercial external threads and The Bolted Joint Analysis calculator allows for stress analysis of a bolted joint, accounting for preload, applied axial load, and applied shear load. Results are provided as both utility ratios and capacities. 13M-2005 18 20. UNEF – Ultra fine pitch thread. Jul 1, 2023 · Popularity: ⭐⭐⭐ Minimum Required Bolt Diameter Calculator This calculator provides the minimum required bolt diameter for a given load and safety factor. Mating Thread Data: Length: Nov 15, 2023 · The Bolt Strength Calculator is a powerful tool designed to determine the tensile strength of a bolt based on its diameter and the applied force. Studs are measured parallel to the axis (L) from the first to the thread without the chamfers (points). 5 times the major bolt diameter. - Head Weight is the weight of the bolt or screw head, which varies by type and size. For example, a DN150 welding neck flange in PN10 requires 8 M20 bolts on a 190 mm bolt circle. The formula used in this calculator is: \[ \text{Required Torque (T)} = k \cdot d \cdot F \cdot (1 + C_l) \] Where: \( k \) is the nut factor constant depending on the bolt size and material. 938194 * 3 = 21. By considering factors such as bolt material, size, and thread type, the calculator simplifies complex torque calculations, promoting safety, reliability, and assembly efficiency. Here’s a step-by-step guide to calculating bolt torque, ensuring you get it just right every time: [ ] Step 1: Gather Information; Bolt size; Material specifications UN thread calculator for calculation of thread basic major, minor, pitch diameters and thread tolerance for the external (bolt) and internal (nut) inch threads according to ASME B1. 8 Added on: 17 May 2019 The height of a nut for a Stud Bolt is the same as the diameter of the thread rod. Bolt Data: Size: The typical minimum recommended value is 1. Popularity: ⭐⭐⭐. 1. UN – Constant pitch (##-UN) thread. 8, G10. Estimation of the bolt size required in an application Example Bolt Estimate Calculation It has been determined that a force of 40 kN is applied to a joint as shown in the diagram. txt) or read online for free. This calculator provides the calculation of bolt size and selection for civil engineering applications. This calculator follows the Air Force Method as documented in the Stress Analysis Manual of the Air Force Flight Dynamics Laboratory (FDL). Apart from the bolt diameter calculation for tensile application, you also need to calculate thread engagement length for the bolt. Check Fasteners Weight Calculator online, View Bolts and Nuts Weight Calculator. Units. The plates are made of steel. Through Bolted Component Thickness. K -constant. All tolerances classes and sizes according to standard. The Bolt Torque Calculation Process. Website News; Desktop Apps; Help; About; Calculators. 8, 10. 19 mm. Click on info button for more info. Force is calculated consistent with units used. Where: - d is the diameter of the bolt or screw. Professional and clear documentation. This tool is designed to help engineers, mechanics, and DIY enthusiasts calculate the torque required for bolted connections to ensure proper fastening. The SkyCiv Bolt Torque Calculator is a free tool to help determine the correct amount of rotational force needed to tighten a bolt. 3/8" 1. Start angle: The 0° angle is to the right in the "X" axis and aligned with the center of the bolt circle in the "Y" axis. xls), PDF File (. Detailed calculations are included in the report. Development of the bolt torque calculator has been done by using the theory given in the Machinery’s Handbook. Intuitive user interface including 3 dimensional graphics. VIII DIV. Flexible anchor positioning for various base plate geometrics. 3. If the “X P” is omitted, the pitch is defined by the Coase Pitch Series according to ISO-261. 6 mm (M1. This document calculates the required bolt size for a universal joint based on the applied torque, length, and safety factor to determine the total load. No lubrication. Loading… Feb 22, 2024 · Find out the different cross-sectional dimensions of any metric bolt's external thread and nut's internal thread using this thread calculator, given the thread pitch, basic major diameter, and tolerance class details of the threads. United Inch Screw Threads Per ASME B1. Calculation Summary Outputs Accuracy of this weight calculator is upto 95%; This tool is for estimation purpose only. English . Clamping Force Calculation. Bolt Root and Tensile Stress Area Table for Metric and Inch Unit Threads ; Bolt Elongation Formula and Calculator per. Verify your calculation, maximize potential of your product. No two bolts respond exactly the same to a given torque. Conversely, you can also use this tool as a bolt clamping force calculator to find the resulting clamping force of any applied bolt torque. on the joint and those on the bolts are roughly parallel to the axes of the bolts. More bolts are required for higher PN ratings to handle the increased force. Calculate the required metric bolt size for your application. 1/8" 1. Downloads: 516. 3/4" 3" 3. Bolt Calculator Wind Load: Designs bolts to handle dynamic loads in structures subject to wind forces. The ThreaDoctor includes 4 sub-apps: Metric Thread Calculator, UN thread Calculator, NPT thread Calculator, and BSP thread calculator. S = free threads equals 1/3 time bolt dia Hex bolts are measured from under the head to the top of de bolt. After entering all these details simply click the run button and the software will do all the calculations for you. Oct 19, 2024 · Calculation Example: Bolt design and selection involves determining the appropriate bolt size, material, and number of bolts required to safely secure a joint or connection. Jan 10, 2015 · So, minimum preload in the bolt, Fp=10 KN. 3: Nominal Pipe Size: Moments Bolt Circle Dia A bolt can be modeled as a fixed-guided beam (i. The Bossard «Online converters» are used for converting different units of measure, such as lengths, hardnesses, pressures etc. (Size = Hex Bolt Diameter) per Bolt: Rate (Rs. Explanation. Based on VDI 2230:2014. Understanding Bolt Size Calculation: Calculating the appropriate bolt size is crucial in various engineering applications. or an online calculator for bolt calculator This interactive tool is intended for the design of bolted connections based on CSA O86:24 Clause 12. Last Modified. This calculator helps determine the appropriate bolt size based on the applied load, allowable tensile stress, and the number of bolts used. Where: Explanation: Pitch: Designated by “X P“. Weight = Nut Volume × Density. 250 varC [in] - bolt circle dia 19 1. +91 22 6777 6777 info@aesteiron. The tool is applicable for: Bolt dimension range from M3 to M39; Bolt strength grades of G8. So for this example we have to select M16 bolt. Things such as dirt in a tapped hole, grease of oil on the threads, damaged threads, hole misalignment, accuracy of torque measuring device, and numerous other factors can alter the torque-tension relationship. ): (This is This design guide and the corresponding calculations are based on the 14th edition of the AISC Steel Construction Manual. Dec 12, 2024 · Enter the bolt diameter, material thickness, and up to two additional parent material thicknesses to determine the proper bolt length. Coefficient of friction. ASME PCC-1When bolt elongation (bolt stretch) measurement is selected as the load-control technique to be used, the required bolt elongation is computed according to the following equation Bolt weight calculator is a convenient and easy-to-use online service that allows industrial specialists to obtain accurate information about the weight of one unit of fastener, as well as in the opposite direction: based on the total weight of the batch, calculate the number of fasteners in the batch. Calculate metric thread geometry dimensions by adding thread size, pitch and tolerances. ASME B1. 9; Axial and transverse loading; Concentric/eccentric and static/dynamic axial loading Bolt and similar fastener specifications and normatives can be found in the DIN EN ISO 898-1 standard. Calculation Example: The bolt size calculator is used to determine the appropriate size of a bolt for a given applied force The values provided by this calculator are for estimation purposes only. Note that each bolt is assumed to resist an equal share of the direct vertical shear and a share of the eccentric moment proportional to its distance from the centroid. Great features. 1 Appendix-2: Equivalent Pressure Check: NC-3658. 0. As always, if you have technical questions, please contact our engineers at 888-393-4517. Nominal size: The size Let's say we have an M30×2-6h bolt, and we want to determine its screw pitch diameter. Weight = (π / 4 × d² × L × Density) + Head Weight. Bolt Torque Calculator. A490M Bolts The flanges are interconnected by n bolts with a diameter d. See also Piston Ring End Gap Calculator Online Formula of Bolt Area Calculator Length Stud Bolt Sizes (Weight in Kilograms) 3/8" 7/16" 1/2" 9/16" 5/8" 3/4" 7/8" 1" 1. Read more to learn about clamping force calculations, methods of indication, and the factors affecting its value. Permissible stress = safe stress for bolt = 650 Mpa, 650 = 10/(3. The calculator below can be used to calculate the torque required to achieve a given axial bolt force or load. It ensures that the bolts used in a structure are strong enough to withstand the applied load without failing. Jul 28, 2024 · Specialized Bolt Load Calculations. Nuts. Standard Non-Structural Bolts Bolt Diameter (in. 1/2" 1. ) and what size thread you will be cutting (i. The proper bolt length ensures that there's enough thread engagement to withstand the loads applied to the joint without causing the threads to strip or the bolt to fail. This calculator can be used for initial sizing of a bolt and preload in a joint according to metric unit system. This calculator provides the calculation of bolt size for a given applied force and tensile strength. The user inputs variables like grip length, nut allowance, washer allowance, and Bolt Threads, Grade, Bolt Strength, Excel Spreadsheet Calculator Reference: AISC 9th Edition Part 4 - 3 tension on gross area Section J - 3, page 5 - 72 and some common sense To calculate the bolt cross-sectional area for tension strength calculations we first calculate the bolt tensile diameter D t as: D t = D 0 - 0. Flange Ratings. Explanation Calculation Example: Suppose we have a load of 10 kN that needs to be applied to a bolted joint. TPI: (Threads per inch) The number of thread, or "V"s along a one inch length which in turns, defines the size of the "V" shape of the helical portion of a thread. The bolts in a tension joint must act like clamps. 8, 8. 9 and G12. dvdibqffulfbcbwbtfjhxxrmdvpmuhgeguxgdzizjtxlhoabyaswwjdzeewiiecqqfyjpgcyyyot