3.4.3.4 INSTALLATION INSTRUCTIONS ( INCLUDING SELECTION GUIDES )
General spacing edge distance and base steel thickness guidelines
X-GR
Edge distance : c ≥ 1 / 2 " ( 12 mm ) Spacing : s ≥ 5 / 8 " ( 15mm ) Base steel thickness : t ll
= 3 / 16 " to 1 / 2 " ( 4 mm to 12 mm )*
* Fastening X-GR fasteners into base steel thicknesses greater than 1 / 2 " ( 12 mm ) is possible for A36 and Grade 40 steels . Site testing required . Reference X-GR installation instructions for more information .
X-MGR
Edge distance : No general restriction for end of beam condition ( reference X-MGR Installation Procedures for more detail ). Spacing : No general restriction .
Base steel ( flange ) thickness : 1 / 8 " to 1 " ( 3 mm to 25 mm )
X-GR selection guide for grating
Fastener description |
Powder-actuated fastener 1 |
Nominal grating height in . ( mm ) |
Min . cross bar spacing 2 in . ( mm ) |
Bearing bar spacing 2 in . ( mm ) |
Base steel thickness 3 in . ( mm ) |
DX tool |
X-GR 1 " |
|
1 |
( 25 ) |
X-GR 1-1 / 4 " |
X-R 20-4.0 Zn P8 |
1-1 / 4 |
( 32 ) |
X-GR 1-1 / 2 " |
|
1-1 / 2 |
( 38 ) |
|
1-3 / 16 ( 30 ) |
1 to 1-1 / 2 ( 23 to 38 ) |
3 / 16 to 1 / 2 ( 4 to 12 ) |
DX 5-GR or DX 6-GR with 6.8 / 11M cartridges |
1 Comes pre-assembled as part of X-GR fastener . 2 Reference step 2 of the X-GR Installation Procedures below for more details on bar spacing requirements . 3 Fastening X-GR fasteners into base material thicknesses greater than 1 / 2 " ( 12 mm ) is possible for A36 and Grade 40 steels . Site testing required . Reference X-GR installation instructions for more information .
X-GR standard installation procedures for grating 1
1 . Place the grating sections following recognized safety precautions .
2 . Install X-GR Fastener per the " Instructions for Use ."
3 . Tighten the screw 2
T rec
= 2.2 – 3.7 ft-lb ( 3 - 5 Nm )
Tightening tool :
• Screw driver with torque release coupling ( TRC )
• 6 mm Allen-type bit
4 . Check installed fastener
Note : position the flat side of the fastener guide to the saddle !
Bearing bar spacing ( a ): a = 1 " to 1-1 / 2 " ( 23 to 38 mm )
Cross bar spacing ( b ): b ≥ 1-3 / 16 " ( 30 mm )
Do not over tighten : The saddle of the fastener should not be bent . h NVS
= 0.28 " – 0.41 " ( 7.0 mm – 10.5 mm )
4a . Check nail stand-off ( h NVS
).
4b . Check that screw has not been over tightened as shown in step 3 .
1 These are abbreviated instructions which may vary by application . ALWAYS review / follow the instructions accompanying the product . 2 Tool torque settings are for guideline purposes . Tool wear and temperature as well as battery charge will influence torque characteristics .
146