Direct Fastening Technical Guide , Edition 24
Allowable loads in minimum f΄c = 3000 psi structural lightweight concrete over 1-1 / 2 ’’ deep , B-type steel deck 1 , 3
Fastener 4
Shank diameter * in . ( mm )
Fastener location :
Minimum embedment in . ( mm )
Allowable loads lb ( kN )
Installed through steel deck panel into concrete 2 Upper flute Lower flute Upper flute Lower flute
Load direction : Tension Shear
Minimum required concrete thickness above deck panel in .
X-C22P8TH 0.138 ( 3.5 ) 3 / 4 ( 19 ) 90 ( 0.40 ) 110 ( 0.49 ) 295 ( 1.31 ) 295 ( 1.31 ) 2-1 / 2 X-C G2 0.108 ( 2.75 )
X-C G3 X-C B3 X-C B4 ( except 36- & 39-mm lengths )
X-P G2 X-P G3 X-P B3 X-P B4
0.118 ( 3.0 )
3 / 4 ( 19 ) 75 ( 0.33 ) 85 ( 0.38 ) 175 ( 0.78 ) 215 ( 0.96 ) 2-1 / 2 1 ( 25 ) 155 ( 0.96 ) 160 ( 0.71 ) 255 ( 1.13 ) 270 ( 1.20 ) 3-1 / 4 3 / 4 ( 19 ) 75 ( 0.33 ) 85 ( 0.38 ) 175 ( 0.78 ) 215 ( 0.96 ) 2-1 / 2
1 ( 25 ) 155 ( 0.96 ) 160 ( 0.71 ) 255 ( 1.13 ) 315 ( 1.40 ) 3-1 / 4
0.118 ( 3.0 ) 5 / 8 ( 16 ) 60 ( 0.27 ) 60 ( 0.27 ) 175 ( 0.78 ) 215 ( 0.96 ) 2-1 / 2
1 The tabulated allowable load values are for the low-velocity fasteners only , using a safety factor that is greater than or equal to 5.0 , calculated in accordance with ICC-ES AC70 . Wood or steel members connected to the substrate must be investigated in accordance with accepted design criteria .
2 Steel deck profiles are 1-1 / 2 ” deep , B-type deck with a thickness of 20 gauge ( 0.0358 ”). Fasteners may be installed through the metal deck into lightweight concrete having both nominal and inverted deck profile orientations with a minimum lower flute width of 1-3 / 4 ” or 3-1 / 2 ”, respectively . Fasteners shall be placed at centerline of deck flutes . Refer to Figures 2 and 3 ( Section 3.2.1.6 ) for additional flute dimensions , fastener locations , and load orientations for both deck orientations . 3 Multiple fasteners are recommended for any attachment . 4 X-U Universal Powder-Actuated fasteners and X-P high performance Powder-Actuated fasteners for concrete base materials with 0.157 ” shank diameters are also available for drywall track fastening and are discussed in more detail in Section 3.2.6 .
Allowable loads in concrete masonry units 1 , 2 , 3 , 4 , 5 , 7 , 10
Fastener
Shank diameter in . ( mm )
Minimum embedment in . ( mm )
CMU type , mortar type
Allowable loads lb ( kN )
Masonry type : Hollow CMU Grout filled CMU
Fastener location : Face shell 6 Mortar joint Face shell 6 Mortar joint
Top of grouted cell 8
X-C G2 ( except for X-C 39 G2 ) X-C 36 B3 X-C 39 B4
X-C 39 G2 X-C 39 G3
X-C G3 X-C B3 X-C B4 ( except 36- & 39-mm lengths )
X-P G2 X-P G3 X-P B3 X-P B4
0.108 ( 2.75 )
0.101 ( 2.6 )
0.118 ( 3.0 )
0.118 ( 3.0 )
Load direction : Tension Shear 9 Tension Shear 7 Tension Shear 9 Tension Shear 7 Tension Shear 9
3 / 4 ( 19.0 )
5 / 8 ( 16.0 )
3 / 4 ( 19.0 )
1 ( 25 )
5 / 8 ( 16.0 )
Normal weight , Type N minimum
Normal weight , Type N minimum
Normal weight , Type N minimum
Normal weight , Type S minimum
Normal weight , Type S minimum
75 ( 0.33 ) 140 ( 0.62 ) 60 ( 0.27 ) 80 ( 0.36 ) 100 ( 0.44 ) 170 ( 0.76 ) 100 ( 0.44 ) 160 ( 0.71 ) 80 ( 0.36 ) 130 ( 0.58 )
110 ( 0.49 ) 190 ( 0.85 ) 70 ( 0.31 ) 145 ( 0.64 ) 135 ( 0.60 ) 195 ( 0.87 ) 125 ( 0.56 ) 165 ( 0.73 ) 110 ( 0.49 ) 145 ( 0.64 )
60 ( 0 . 27 ) 110 ( 0 . 49 ) 45 ( 0 . 20 ) 65 ( 0 . 29 ) 85 ( 0 . 38 ) 110 ( 0 . 49 ) 55 ( 0 . 24 ) 105 ( 0 . 47 ) - -
145 ( 0 . 64 ) 190 ( 0 . 85 ) 80 ( 0 . 36 ) 80 ( 0 . 36 ) 155 ( 0 . 69 ) 195 ( 0 . 87 ) 110 ( 0 . 49 ) 135 ( 0 . 60 ) 105 ( 0 . 47 ) 145 ( 0 . 64 )
185 ( 0 . 82 ) 205 ( 0 . 91 ) 105 ( 0 . 47 ) 105 ( 0 . 47 ) 205 ( 0 . 91 ) 215 ( 0 . 96 ) 135 ( 0 . 60 ) 190 ( 0 . 85 ) 120 ( 0 . 53 ) 150 ( 0 . 67 )
40 ( 0 . 18 ) 80 ( 0 . 36 ) 15 ( 0 . 07 ) 40 ( 0 . 18 ) 90 ( 0 . 40 ) 100 ( 0 . 44 ) 40 ( 0 . 18 ) 80 ( 0 . 36 ) 60 ( 0 . 27 ) 85 ( 0 . 38 )
1 The tabulated allowable load values are for the low-velocity fastener only , using a safety factor of 5.0 or higher calculated in accordance with ICC-ES AC70 . Wood or steel members connected to the substrate must be investigated in accordance with accepted design criteria .
2 The tabulated allowable load values are for low-velocity fasteners installed in normal weight or lightweight concrete masonry units conforming to ASTM C90 .
3 The tabulated allowable load values are for low-velocity fasteners installed in concrete masonry units with mortar conforming to ASTM C270 , Type N .
4 The tabulated allowable load values are for low-velocity fasteners installed in concrete masonry units with grout conforming to ASTM C476 , as coarse grout .
5 The tabulated allowable load values are for one low-velocity fastener installed in an individual masonry unit cell and at least 8 ” from the edge of the wall . Unless otherwise noted , multiple fasteners in a bed joint must be spaced a minimum of 8 inches .
6 Applicable placement zone of fastener located on the face shell is shown in the figure to the right .
7 Shear direction can be horizontal or vertical ( Bed Joint or T-Joint ) along the
CMU wall plane . 8 Fastener located in center of grouted cell installed vertically . 9 Shear can be in any direction . 10 Multiple fasteners are recommended for any attachment .
3 ”
3 ” 1.5 ”
3 ”
CMU web
Zone for PAF installation
59