1.1 Steel Deck Fastener Design and Selection
1.1 . Terminology and Definitions 1.1.1.1 Fastener Terminology
DX
ENP
F
= Hilti terminology for direct fastening powder-actuated technology
= Hilti fastener type used for attaching steel deck to structural support steel with DX 76 and DX 860-ENP powder-actuated tools ( X-ENP19 L15 )
= diaphragm flexibility factor , micro-inch / lb ( mm x 10 -6 / N )
G ' = diaphragm shear stiffness lb / in . ( N / mm x 10 -6 ) HSN
= Hilti High Shear Nail fastener type for attaching steel deck to bar joist support steel used with DX 860-HSN and DX 460-SM powder-actuated tools ( X-HSN 24 )
q = allowable diaphragm shear , plf ( N / mm )
Q f
= structural connector strength , lb ( kN )
Q s
= fastener strength , panel to panel , lb ( kN )
S f
= fastener flexibility factor , panel to frame , in ./ kip ( mm / kN )
S s
= fastener flexibility factor , panel to panel , in ./ kip ( mm / kN ) t f
( t || )
= flange thickness of beam or bar joist for steel deck applications , in . ( mm )
ICC-ES = International Code Council - Evaluation Service SDI
= Steel Deck Institute CSSBI = Canadian Sheet Steel Building Institute
1.1.1.2 X-HVB Shear Connector Terminology h r
= nominal rib height , in . ( mm )
H s
= connector height , in . ( mm )
N r
= number of connectors in one rib q = allowable shear strength , lb ( kN )
Q n
= nominal shear strength , lb ( kN )
R g
= coefficient to account for group effect w r
= average width of rib , in . ( mm )
Y con
= distance from top of steel beam to top of concrete slab , in . ( mm )
1.1.1.3 Steel Deck Definitions
Base Material - The existing part of the work that is a base for the fastening . The structural steel or bar joist framing members in steel deck applications .
Beam - One of the principal horizontal supporting members of a building .
Burn through - Unintended welding-related holes created in steel deck .
Button punch - A mechanical means of connecting two pieces of sheet metal together by crimping with a special tool . This method is used on BI or interlocking deck panels .
Direct fastening - A fastening method in which the fastenings are made without any preparation steps such as drilling a hole . Examples are powder-actuated fastening and self-drilling screws .
Diaphragm deck - A decking system which is designed to carry lateral loads due to wind or seismic action in addition to gravity loads and wind uplift .
Endlap - The overlap of adjacent steel deck panels at the ends of the panels ( end edges perpendicular to the steel deck panel fluting ). Typically specified as 2 or 4 inches . Butted deck with no endlap is used for some steel deck ( e . g ., cellular ).
Fastener pattern - The number and spacing of fasteners at each support for a steel deck panel .
Fastened material - The component that must be attached to the base or supporting material .
Fastening - The combination of fastener , fastened material and base material all in final position .
Fastening system - The fastener , fastening tool and driving power source all taken together as a system with specific performance characteristics .
Gauge - A measure of thickness for sheet metal . Reference Section 1.1.7 for common steel deck gauges .
Interlocking sidelap ( BI Connection ) - Steel deck panels having male and female side edges . The adjacent deck panel male and female edges interlock into each other when the deck is installed . The interlocks are fastened together using button punches , proprietary punch systems , welds , or screws .
Joist - A structural member in a building which is used to support a floor or roof .
2 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