X-P & X-U Concrete Fasteners Tech Supplement March 2025 | Page 6

Technical Supplement

Acceptable Locations ( NON-SHADED AREAS ) for X-U Universal Knurled Shank Fasteners in CMU Walls

Table 7 . Ultimate and allowable loads in minimum ASTM A36 ( F y ≥ 36 ksi ; F u ≥ 58 ksi ) steel 1 , 2 , 3 , 4

Fastener Shank diameter in . ( mm ) Load type

Steel thickness in . 3 / 8 1 / 2 ≥3 / 4 6 Tension lb ( kN ) Shear lb ( kN ) Tension lb ( kN ) Shear lb ( kN ) Tension lb ( kN ) Shear lb ( kN )

Ultimate 5688 ( 25.3 ) 4426 ( 19.7 ) 4690 ( 20.9 ) 3761 ( 16.7 ) 1899 ( 8.5 ) 2046 ( 9.1 ) X-U 0.157 ( 4.0 )

Allowable 935 ( 4.2 ) 720 ( 3.2 ) 900 ( 4.0 ) 720 ( 3.2 ) 350 ( 1.6 ) 375 ( 1.7 ) 1 The tabulated ultimate load values are for the low-velocity fasteners only based on testing in accordance with ICC-ES AC 70 and ASTM E1190 . Allowable loads are calculated based on a safety factor of at least 5.0 . Some

conditions like high wind loads , shock or fatigue may require a different safety factor . 2 Low-velocity fasteners shall be driven to where the point of the fastener penetrates through the steel base material , except as noted . 3 Multiple fasteners are recommended for any attachment . 4 When used for resisting seismic forces , allowable loads are valid as per ICC-ES AC70 , Annex A . 5 For fastening of cold-formed sheet steel , up to 16 gauge , for static loads only , when designed in accordance with AISI S100 ( Section J5.2 ): The tabulated allowable load may be increased by a factor of 1.25 , and the

design strength may be taken as the tabulated allowable load multiplied by a factor of 2.0 ( 2.4 ) 6 Tabulated ultimate load values provided for ≥ 3 / 4 " steel are based upon minimum point penetration of 1 / 2 " into the steel . If 1 / 2 " point penetration into the steel is not achieved , but a point penetration of at least 3 / 8 " is obtained , the tabulated tension value should be reduced by 20 % and the tabulated shear value should be reduced by 8 %.

Table

8 . Allowable tensile pullover and shear bearing load capacities for steel framing with X-P and X-U Powder-Actuated

Fasteners 1 , 2 , 3 , 4

Fastener description

0.157 ” shank with or without plastic washers or MX collation

Fastener

X-U X-P

Head diameter in . ( mm )

0.322 ( 8.2 ) 825 ( 3.67 ) 1,085 ( 4.83 ) 685 ( 3.05 ) 720 ( 3.20 ) 490 ( 2.18 ) 525 ( 2.34 ) 360 ( 1.60 ) 445 ( 1.98 )

Fastener description

0.157 ” shank with or without plastic washers or MX collation

Fastener

X-U X-P

Head diameter in . ( mm )

Tension lb ( kN )

Sheet steel thickness 22 ga . 24 ga . 25 / 26 ga .

Shear lb ( kN )

Tension lb ( kN )

Shear lb ( kN )

Tension lb ( kN )

Shear lb ( kN )

0.322 ( 8.2 ) 300 ( 1.33 ) 330 ( 1.47 ) 205 ( 0.91 ) 255 ( 1.13 ) 120 ( 0.53 ) 145 ( 0.64 )

1 Allowable load values are based on a safety factor of 3.0 . 2 Allowable pullover capacities of sheet steel should be compared to allowable fastener tensile load capacities in concrete , steel , or masonry to determine controlling resistance load . 3 Allowable shear load bearing capacities of sheet steel should be compared to allowable fastener shear capacities in concrete , steel or masonry to determine controlling resistance load . 4 Data is based on the following minimum sheet steel properties , F y = 33 ksi , F u = 45 ksi ( ASTM A653 material ).

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