[2.4
PAINT
Ungalvanized steel, if used, shall be thoroughly cleaned, phosphate
treated, and coated with corrosion-inhibiting primer, FS TT-P-664.
]2.5
PLASTIC GROMMETS
Supply plastic grommets, recommended by stud manufacturer, to protect
electrical wires. Prevent metal to metal contact for plumbing pipes.
PART 3
EXECUTION
3.1
FASTENING
self-tapping screws. Electrodes and screw connections shall be as required
and indicated in the design calculations.
3.1.1
Welds
**************************************************************************
NOTE: The welding of cold-formed steel should be
performed by qualified workmen. The Contractor,
Subcontractor, or Fabricator shall provide
verification that welders are qualified in
accordance with AWS D1.3.
TI 809-07 provides suggested design values for
fillet and flare-bevel welds. Welding is not
recommended on minimum metal thickness of less than
1.09 mm (0.0428 inch).
**************************************************************************
All welding shall be performed in accordance with AWS D1.3, as modified by
AISI SG02-1. All welders, welding operations, and welding procedures shall
be qualified according to AWS D1.3. All welds shall be cleaned and coated
with rust inhibitive galvanizing paint. Do not field weld materials
lighter than 1.2 mm 18 gage.
3.1.2
Screws
**************************************************************************
NOTE: TI 809-07 provides suggested capacities of
screw connections. Screws will not be used to
resist pullout type loadings.
Minimum Screw Sizes for Steel-to-Steel Connections
Point
Minimum
Total Thickness of Steel
Size
Screw Size
(mm (in))
2
#8
2.540
mm
(0.100
inches
max)
2
#10
2.794
mm
(0.110
inches
max)
2
#12
3.556
mm
(0.140
inches
max)
3
#8
3.556
mm
(0.140
inches
max)
3
#10
4.445
mm
(0.175
inches
max)
3
#12
5.334
mm
(0.210
inches
max)
Total thickness of steel is combined thickness of all connected steel
SECTION 05400
Page 9
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