Steel Deck Fastening Systems
1.1 Steel Deck Fastener Design and Selection
h NVS well above
optimal range*
Top Hat not collapsed, not
snug against steel deck
and not clamping deck
sheet to base steel
Figure 11a: Under Driven X-HSN 24 Fastener with Single Sheet to
Base Steel
h NVS within
optimal range*
Top Hat properly
collapsed, snug against
steel deck and clamping
deck sheet to base steel
Figure 11b: Properly Driven X-HSN 24 Fastener with Single Sheet to
Base Steel
h NVS well below
optimal range*
Washer cutting into deck
sheet, deforming base
steel and deck sheet
Figure 11c: Over Driven X-HSN 24 Fastener with Single Sheet to
Base Steel
* Optimal stand-off (h NVS ) range for the X-HSN 24 fastener is 5 mm ≤ h NVS ≤ 9 mm.
8 Hilti, Inc. (US) 1-800-879-8000 | www.us.hilti.com I en español 1-800-879-5000 I Hilti (Canada) Corp. 1-800-363-4458 I www.hilti.ca I PTG Decking Supplement 2014