Transcription of Blacks Structural Bolts
1 45 FASTENERSF asteners your guarantee of quality industrial fastenersBlacks Structural BoltsTable 26 bolt Types and bolting CategoriesDetails of bolt usedMinimum MinimumBoltingTensileYieldCategory Strength Strength StrengthAustralian Method ofGrade(MPa)(MPa)NameStandardTensioning 1111 Use Snug costly and mostcommonly Grade 1252 Bolts used are SnugStrengthtightened. The highStructuralstrength Structural has alarge bolt head and nutbecause it is designed towithstand full tensioning(see categorydescription).
2 However, itcan also be used in asnug tight 1252In both applications boltsStrengthare fully Tensioned toStructuralthe requirements ofBolt FullyAS4100. Cost of is an important con-Frictionsideration in the use ofType Jointthese bolting FullyTensionedBearingType Joint45845 Blacks bolt body 3/9/06 2:11 PM Page 4546 Fasteners your guarantee of quality industrial fastenersBlacks Structural BoltsFASTENERST able 27 Design Shear and Tension Capacities Strength Limit StateCommercial Bolts bolting Category(fuf= 400 MPa)Grade Values (Single Shear)BoltAxialThreads includedThreads excludedSizeTensionin Shear Plane N from Shear Plane X Ntf Vfn = = Tearout Design Capacity.
3 For all reasonable combinations of plythickness, bolt diameter and end distance, the design capacity for a ply inbearing ( Vb) exceeds both Vfnand 28 Design Shear and Tension Capacities Strength Limit StateHigh Strength Structural bolting Categories(fuf= 400 MPa)Grade ShearPlate TearoutBearingBoltAxialThreads ThreadsSizeTensionincluded excluded Vbfor tp& aeof: Vbfor tpfinfromShearShearPlanePlane Ntf Vfn Vfxtp= 6tp= 8tp= 10tp= 12kNkNkN35 40 45 35 40 45 35 40 45 35 40 151 89 100 103 118 133 129 148 166 155 177 199 142 189 236M24234133186170 227 283M30373214291213 283 354ae< aemin= df = = = = 410 MPafup=410 MPa45845 Blacks bolt body 3/9/06 2.
4 11 PM Page 4647 Blacks Structural BoltsFASTENERSF asteners your guarantee of quality industrial fastenersTable 29 Reduction factor for lap connections (kr)LengthLj< 300300 Lj 1300Lj> 30 Minimum bolt tension atinstallationNominalMinimum BoltDiameter ofTensionBoltkNM1695M20145M24210M30335M3 6490 Table 31 Summary of Slip FactorsSurfaceAverageTreatmentSlip FactorUncoatedClean oxide zinc zinc GalvanisedClean abrasive : The minimum bolt tensionsgiven in this Table are approximatelyequivalent to the minimum proof loadsgiven in AS 32 Design Shear Capacity Serviceability Limit StateHigh Strength Structural Bolts bolting Category( = nei= 1 = )Grade TensionDesign Capacity in Shear ( Vsf) forSizeat Installationkh= 1kh= length of a bolted lap splice Blacks bolt body 3/9/06 2.
5 11 PM Page 4748 Fasteners your guarantee of quality industrial fastenersBlacks Structural BoltsFASTENERSB lacks High StrengthStructural BoltsTable 33aMinimum Pitchbetween Centres of FastenerHoles (Clause of AS 4100-1990)Minimum distanceBoltbetween centres ofsizefastener holes mmM1230M1640M2050M2460M3075M3690 NOTE: The edge distance mayalso be affected by Clause AS 4100-1990 Table 33bMinimum Edge Distance ( of AS 4100-1990)Sheared or Rolled Plate;Hand FlameMachineRolled EdgeBoltCut EdgeFlame Cutof a RolledSizeSawn orSectionPlaned Edge(mm)(mm)(mm)M12211815M16282420M20353 025M24423630M30534538M36635445 NOTE.
6 The edge distance may also beaffected by Clause of AS 4100-1990 Property Class ISO Metric CoarsePitch SeriesDimensions to AS 1252 Table 34 bolt DimensionsNut DimensionsPitchWidthWidthWidthThicknessS izeofBody dimensions in Blacks bolt body 3/9/06 2:11 PM Page 48
