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Fastening Information for Atlas Nail Base Fasteners

ACFoam® Nailable Insulations: 4' x 8' (1220mm x 2440mm)

APPROVED DECKS:

  • 18–22 ga. Steel Deck (3/4” through deck [top flange])
  • Structural Concrete (2500 psi min.) 3/16” pre-drilled pilot hole required (1” penetration into deck)
  • 1" minimum Wood Plank and T & G (1” penetration into deck)
  • 19/32" minimum plywood (1/2” through deck)

FM 1-60, 1-90, 1-105: 15 Fasteners (min.) for CrossVent, CrossVent RB and Nail Base Insulation (Steel Deck and Structural Concrete)

For projects requiring FM wind rating, FM approved assembly, including deck and roof covering, is required.

Atlas Nailbase Fastener Installation Recommendations

  • The fasteners should be installed using an 1800-2500 RPM (max.) screw gun with a hardened drive bit. Standard electric drill guns are not recommended for installation of Atlas Nail Base Fasteners.
  • Metal decks are acceptable deck types provided they are between 18 ga. (max.) and 22 ga. (min.). Be sure to determine the gauge of the deck. For 16 ga. or heavier, consult the Atlas Technical Department.
  • The roof perimeter area is defined as a band equal in width to 10% of the lesser plan dimension or 40% of the mean roof height. (Minimum band width is 4 ft.)

Required Number of Atlas Nail Base Fasteners - Table 1

Roof Slopes Roof Area 3:12/6:12 7:12/12:12 14:12/24:12
Snowload +10 PSF Dead Load=Total Load PSF   10-30 40 50 60 70 80 90 10-30 40 50 60 70 80 90 10-30 40 50 60 70 80 90
18-22 ga. Steel Field 15 15 15 15 15 15 20 15 20 20 20 25 25 30 20 25 30 30 35 35 40
Perimeter 25 25 25 20 20 20 20 20 20 25 25 25 25 30 20 30 30 30 35 40 40
1" Wood or Structural Concrete Field 15 15 15 15 15 15 15 15 15 20 20 20 25 25 15 20 25 25 30 30 35
Perimeter 20 20 20 20 20 20 20 15 20 20 20 20 25 25 15 25 25 30 30 35 35
19/32" Plywood Minimum Field 15 15 15 20 20 25 25 15 25 25 25 30 35 40 20 30 35 40 45 45 50
Perimeter 25 25 25 25 25 25 25 20 25 30 30 30 35 40 20 35 35 40 45 45
50

1. Table 1 applies to roofs in areas of wind velocity not exceeding 110 mph, Exposure C, Importance Factor I =1.15, and maximum mean roof height of 60 feet. For overhangs, consult Atlas's Technical Department.

2. Table 1 is valid only for use with Atlas Nail Base Fasteners.

3. Refer to pp. 26-28 for appropriate fastening patterns.

4. When plywood is used as the top surface of the ACFoam® nailable insulations, additional fastening is required.
See Technical Update dated 01/04/11.

5. The roof perimeter area is defined as a band equal in width to 10% of the lesser roof plan dimension or 40% of the mean roof height, whichever dimension is less (Minimum band width is 4ft.). Note: Perimeter area also includes corners.

Required Number of Atlas Nail Base Fasteners - Table 2

Roof Slopes Roof Area 3/12 4/12 5/12 6/12 7/12 8/12 9/12 10/12 11/12
18-22 ga. Steel Field 25 25 25 25 30 30 30 30 30
Perimeter 45 45 45 45 35 35 35 35 35
1" Wood or Structural Concrete Field 20 20 20 20 20 20 20 20 20
Perimeter 35 35 35 35 25 25 25 25 25
19/32" Plywood Minimum Field 20 20 20 20 25 25 25 25 25
Perimeter 40 40 40 40 30 30 30 30 30
Roof Slopes Roof Area 12/12 14/12 15/12 16/12 17/12 18/12 20/12 22/12 24/12
18-22 ga. Steel Field 30 30 30 30 30 30 30 30 30
Perimeter 35 35 35 35 35 35 35 35 35
1" Wood or Structural Concrete Field 20 25 25 25 25 25 25 25 25
Perimeter 25 25 25 25 25 25 25 25 25
19/32" Plywood Minimum Field 25 25 25 25 25 25 25 25 25
Perimeter 30 30 30 30 30 30 30 30 30

1. Table 2 applies to roofs with no snow load and wind velocity over 110 mph, but not exceeding 146 mph, in combination with 10 psf Dead Load, Exposure C, Importance Factor I=1.15 and maximum mean roof height of 60 feet. For overhangs, consult Atlas's Technical Department.

2. Table 2 is valid only for use with Atlas Nail Base Fasteners.

3. Refer to pp. 26-28 for appropriate fastening patterns.

4. When plywood is used as the top surface of the ACFoam® nailable insulations, additional fastening is required. See Technical Update dated 01/04/11.

5. The roof perimeter area is defined as a band equal in width to 10% of the lesser roof plan dimension or 40% of the mean roof height, whichever dimension is less (Minimum band width is 4ft.). Note: Perimeter area also includes corners.

 

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Nailable Insulation