Direct Fastening Technical Guide , Edition 22
3.2.16.4.3 EUROPEAN LOAD TABLES
Recommended static loads — Standoff Adaptor with X-BT MR threaded studs 1 , 2 , 3 , 4 , 5
Load type / fastener
Tension , lb ( kN ) 25 , 50 , 75 , 100 mm
Shear , lb ( kN ) 25 mm Adaptor
Shear , lb ( kN ) 50 mm Adaptor
Shear , lb ( kN ) 75 mm Adaptor
Shear , lb ( kN ) 100 mm Adaptor
Tightening Torque , ft-lb ( Nm ) 6
Standoff Adaptor on X-BT
Nut on Standoff Adaptor
Design resistance — Standoff Adaptor with X-BT MR threaded studs 1 , 2 , 3 , 4 , 5
Load type / fastener
Tension , lb ( kN ) 25 , 50 , 75 , 100 mm
Shear , lb ( kN ) 25 mm Adaptor
Shear , lb ( kN ) 50 mm Adaptor
Shear , lb ( kN ) 75 mm Adaptor
Shear , lb ( kN ) 100 mm Adaptor
Minimum ASTM A36 Steel
Minimum ASTM A36 Steel
Minimum grade 50 steel
810 ( 3.60 ) 1035 ( 4.60 )
255 ( 1.14 ) 320 ( 1.43 )
140 ( 0.62 ) 175 ( 0.78 )
115 ( 0.52 ) 145 ( 0.65 )
80 ( 0.35 ) 100 ( 0.44 )
5.9 ( 8.0 ) 5.9 ( 8.0 )
14.8 ( 20.0 ) 14.8 ( 20.0 )
Notes :
1 . Recommended laods are for MR and MF Standoff Adaptors in conjunction with X-BT MR M8 threaded studs . Moments on the stud beyond those induced by the shear load must be evaluated .
2 . All installation parameters for X-BT MR M8 fasteners must be followed .
3 Recommended loads are based on a global safety factor of 2.8 applied to the characteristic resistance for static tension or shear , which are derived from the 5 % fractile of the ultimate load . Recommended moment values are based on a global safety factor of 1.75 . This safety concept is commonly used in regions outside of North America , where design is carried out in accordance with the Eurocode . 4 . Multiple fasteners are recommended for any attachment . 5 . Fastened material must be considered separately . 6 . When installing nut on standoff adaptor , care should taken to ensure standoff adaptor connection to S-BT is does not experience excess torque .
Minimum grade 50 steel
1120 ( 5.00 ) 1460 ( 6.50 )
360 ( 1.60 ) 450 ( 2.00 )
195 ( 0.87 ) 245 ( 1.09 )
165 ( 0.73 ) 205 ( 0.91 )
110 ( 0.49 ) 135 ( 0.61 )
Notes :
1 . Design resistances are for MR and MF Standoff Adaptors in conjunction with X-BT MR M8 threaded studs . Moments on the stud beyond those induced by the shear load must be evaluated .
2 . All installation parameters for X-BT MR M8 fasteners must be followed .
3 . Design resistance is based on a safety factor of γM = 2.0 applied to the characteristic resistance for static tension or shear , which is derived from the 5 % fractile of the ultimate load . Design resistance should be greater than calculated demand that has been reduced by a partial safety factor . This safety concept is commonly used in regions outside of North America , where design is carried out in accordance with the Eurocode . 4 . Multiple fasteners are recommended for any attachment . 5 . Fastened material must be considered separately .
Recommended static loads — Standoff Adaptor with S-BT threaded studs 1 , 2 , 3 , 4 , 5
Load type / fastener
Tension , lb ( kN ) 25 , 50 , 75 , 100 mm
Shear , lb ( kN ) 25 mm Adaptor
Shear , lb ( kN ) 50 mm Adaptor
Shear , lb ( kN ) 75 mm Adaptor "
Shear , lb ( kN ) 100 mm Adaptor
Tightening Torque , ft-lb ( Nm ) 6
Standoff Adaptor on S-BT
Nut on Standoff Adaptor
Minimum ASTM A36 steel Miniumum grade 50 steel
1 / 8 " - 3 / 16 " Thick
≥ 7 / 32 " Thick
1 / 8 " - 3 / 16 " Thick
≥ 7 / 32 " Thick
405 ( 1.8 ) 425 ( 1.9 ) 470 ( 2.1 ) 515 ( 2.3 )
125 ( 0.55 ) 190 ( 0.84 ) 125 ( 0.55 ) 225 ( 1.00 )
70 ( 0.31 ) 100 ( 0.45 ) 70 ( 0.31 ) 120 ( 0.54 )
55 ( 0.24 ) 75 ( 0.33 ) 55 ( 0.24 ) 90 ( 0.40 )
40 ( 0.18 ) 50 ( 0.23 ) 40 ( 0.18 ) 60 ( 0.28 )
3.6 ( 5.0 ) 5.9 ( 8.0 ) 3.6 ( 5.0 ) 5.9 ( 8.0 )
14.8 ( 20.0 ) 14.8 ( 20.0 ) 14.8 ( 20.0 ) 14.8 ( 20.0 )
Notes : 1 . Recommended loads are for MR and MF Standoff Adaptors in conjunction with S-BT threaded studs .
Moments on the stud beyond those inudced by the shear load must be evaluated . 2 . All installation parameters for S-BT fasteners must be followed . 3 . Recommended loads are based on a global safety factor of 2.8 applied to the characteristic resistance for static tension or shear , which are derived from the 5 % fractile of the ultimate load . Recommended moment values are based on a global safety factor of 1.75 . This safety concept is commonly used in regions outside of North America , where design is carried out in accordance with the Eurocode . 4 . Multiple fasteners are recommended for any attachment . 5 . Fastened material must be considered separately . 6 . When installing nut on standoff adaptor , care should taken to ensure standoff adaptor connection to
S-BT is does not experience excess torque .
Design resistance — Standoff Adaptor with S-BT threaded studs 1 , 2 , 3 , 4 , 5
Load type / fastener
Tension , lb ( kN ) 25 , 50 , 75 , 100 mm
Shear , lb ( kN ) 25 mm Adaptor
Shear , lb ( kN ) 50 mm Adaptor
Shear , lb ( kN ) 75 mm Adaptor
Shear , lb ( kN ) 100 mm Adaptor
Minimum ASTM A36 steel
1 / 8 " - 3 / 16 " Thick
≥ 7 / 32 " Thick
Minimum grade 50 steel
1 / 8 " - 3 / 16 " Thick
≥ 7 / 32 " Thick
560 ( 2.5 ) 605 ( 2.7 ) 670 ( 3.0 ) 715 ( 3.2 )
170 ( 0.77 ) 260 ( 1.17 ) 170 ( 0.77 ) 315 ( 1.41 )
95 ( 0.43 ) 140 ( 0.64 ) 95 ( 0.43 ) 170 ( 0.76 )
75 ( 0.34 ) 105 ( 0.47 ) 75 ( 0.34 ) 125 ( 0.55 )
55 ( 0.25 ) 70 ( 0.32 ) 55 ( 0.25 ) 90 ( 0.39 )
Notes : 1 . Design resistances are for MR and MF Standoff Adaptors in conjunction with S-BT threaded studs .
Moments on the stud beyond those induced by the shear load must be evaluated . 2 . All installation parameters for S-BT fasteners must be followed . 3 . Design resistance is based on a safety factor of γM = 2.0 applied to the characteristic resistance for static tension or shear , which is derived from the 5 % fractile of the ultimate load . Design resistance should be greater than calculated demand that has been reduced by a partial safety factor . This safety concept is commonly used in regions outside of North America , where design is carried out in accordance with the Eurocode . 4 . Multiple fasteners are recommended for any attachment . 5 . Fastened material must be considered separately .
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