Ul 580 wind uplift information (cont.) – Metal Sales T-Armor Series User Manual

Page 30

1. Metal Roof Deck Panels* - Min No. 24 MSG gauge steel or stainless steel or 0.030 in. thick aluminum, nom

18 in. wide, 2-3/8 in. high standing seams. Heavier gauges or narrower panels acceptable. Panels continuous

over three or more clips with no end laps.

2. Panel Clips* - No. 16 MSG min gauge coated steel or stainless steel, 6 in. long by 2.718 in. high. Base to

have four .281 in. dia. guide holes to accommodate screw fasteners (Item 4). Clips spaced 24" on center

maximum, fastened through plywood decking.

3. Cap - Used at seam, nom 1 in. wide, 1/2 in. deep fabricated from min No. 24 MSG gauge steel, stainless

steel, or .030 in. thick aluminum. Cap continuously seamed over panel seams using an electric seaming tool.

Seaming process to include panel clips (Item 2).

4. Fasteners - (Screws) - Fasteners used to attach panel clips to plywood deck to be No. 12-11 Low profile,

No.3 Square drive wood screw. Two fasteners per clip to be used.

5. Underlayment - (Optional) - (Not Shown) Underlayment used over plywood deck to be type 15 or 30 organic

felt. Sides overlapped min 2 in., end laps per manufacturers's instructions. Felt nailed to plywood deck with

1-1/4 in. long steel cap nails, located per manufacturer's instructions. Nail spacing to be max 12 in. OC at

the side lap and max 24 in. OC in interior rows.

As An Alternate - A self-adhering modified bitumen water

proofing membrane may be used, installed per manufacturer's instructions. Note - when alternate is used the

plywood joints need not be sealed.

6. Plywood Decking - Plywood decking to be graded per PS83 specifications, 19/32 in. thick, exposure 1, APA

Rated Sheathing (42/20) square edged. Butt ends not blocked. All butt and side joints to be sealed against

leakage by using tape and/or caulk. (Note exception under Item 5, Alternate).

7. Supports - Spaced max of 24 in OC. Any of the following types may be used to support the plywood decking.

a) Nom 2 by 6 in., No. 2 grade or better S-P-F, Hemlock Fir, Douglas Fir or Southern Yellow Pine or

equivalent.

b) Wood trusses with a nom 2 by 4 in. upper chord of the grade as item a.

c) No. 22 MSG min cold formed coated steel (min yield to be 33 ksi)

8. Plywood Fasteners - (Not Shown) - Fasteners used to attach the plywood deck to the supports to be as

follows:

a) For plywood-to-wood supports No. 8-18 by 1-7/8 in. long bugle-head steel screw with a No. 2 Phillips

drive, a "Hi-Low" thread pattern and an "S-Point".

b) As an alternate to Item a, 8d common nails may be used.

c) For plywood-to-steel supports for a steel thickness less that No. 20 MSG No. 7-19 by 1-1/4 in. long

bugle-head steel screw with a No. 2 Phillips drive, a " Hi-Low" thread pattern and an "S-Point". For a steel

thickness greater than No. 20 MSG to No. 16 MSG, No. 6-20 by 1-1/4 in. long bugle-head steel screws with

a No. 2 phillips drive and a S12 (TekS/3)supR point.

Spacing: Fasteners spacing for all fasteners types to be 6 in OC at the plywood edges and 12 in. OC in the

interior.

Refer to General Information, Roof Deck Construction (Roofing Materials and Systems Directory) for items

not evaluated.

*Bearing the UL Classification Mark

Construction No. 268B

July 15, 2013

Uplift - Class 90

Fire Not Investigated

UL 580 WIND UPLIFT INFORMATION (CONT.)

T-ARMOR

Underwriters Laboratories Inc.

LISTED