Roof Safety Walkway Aluminum Grating Prices Anti-Skid Aluminum Grip Strut Metal Grating

General Load Information
Heavy-Duty Grip Strut Grating Walkways and Planks are
available in three thicknesses of steel, one of aluminum:
walkways have one standard siderail height, planks have four.
In each category, walkways come in three widths, planks in five.
Begin sizing, for maximum economy, with widest practical
grating for the job (shallowest siderails and thinnest gauge); if
this does not meet required load capacity, first consider deeper
siderails, then heavier gauge, and finally narrower grating width,
if necessary.
Flexural load tables have been calculated according to design
load limiting criteria, and if not illustrated in this catalog they
can be obtained from Cooper B-Line technical services.
“Strut Load Tables” show flexural strength and deflection of
individual grating surface struts relative to siderails. Since
these are maximum values in the elastic range, lesser
loads/deflections can be proportioned from them.
Design load assumptions differ according to load type: (1)
uniform, (2) concentrated (see Figures 1, 2 and 3 below for
explanation of load application). Concentrated load capacities
generally vary with span, siderail height and material thickness,
irrespective of grating width, although large differences in grating width cause concentrated loads to be distributed
somewhat differently into siderails.
Siderail strength usually controls, but with shorter spans,
deeper siderails, and/or wider grating surfaces, flexural
strength of individual struts may control. In sizing
walkways/planks with strength as a design criterion, be sure
to check Heavy-Duty Grip Strut Grating for both: (1) strength
of walkways/plank siderails, (2) strength of individual struts in
grating surface. With deflection as a design criterion, loads
may be limited by either: strength of individual surface struts,
or total deflection of one siderail at midspan plus a surface
strut at midwidth of walkway/plank (sum of siderail deflection
plus strut deflection).
All load tables show maximum loads, based upon actual load
tests performed at the Pinckneyville (IL) plant, and determined
in accordance with AISI “Specification for the Design of ColdFormed Steel Structural Members”, 1980 Edition, using
minimum yield strength of 33 ksi for steel, 23 ksi for aluminum.