Flex TPO Enhanced Wind Uplift - Manual

8/2012 1
Flex Membrane International Corp. 2670 Leiscz’s Bridge Road, Suite 400, Leesport, PA 19533 Tel: 610-916-9500 Fax: 610-916-9501
FLEX TPO PLUS MEMBRANE
ENHANCED WIND UPLIFT FASTENING REQUIREMENTS
The following is general information regarding Flex TPO Plus Roof System design requirements for areas
in which wind speed velocities may occur in excess of 55 miles per hour. A wind uplift pressure design
professional accredited in the specific area should calculate the wind uplift pressure resistance required for
the project. The wind uplift pressure resistance values can then be matched to existing approved Flex
Roof Assemblies. Contact Flex Technical Services for additional information regarding approved
assemblies.
A. Approved Decks:
Mechanically Fastened Roof Systems
1) Approved Decks (wind speeds to 72 mph)
a) 22 gauge steel
b) Structural concrete (3000 psi)
c) Wood Plank (1 1/2” min.)
d) CDX Plywood (5/8”min.)
e) OSB (7/16”min)
f) Lightweight Insulating concrete over steel deck
g) Gypsum
h) Cementitious Wood Fiber
2) Approved Decks (wind speeds to 80 mph)
a) 22 gauge steel
b) Structural concrete (3000 psi)
c) Wood Plank (1 ½” min.)
d) CDX Plywood (15/32”min.)
3) Approved Decks (wind speeds to 100 mph)
a) 22 gauge steel
b) Structural concrete (3000 psi)
c) Wood Plank (1 ½” min.)
Adhered Roof Systems
1) Approved Decks (wind speeds to 72 mph)
a) 22 gauge steel
b) Structural concrete (3000 psi)
c) Wood Plank (1 ½” min.)
d) CDX Plywood (5/8”min.)
e) OSB (7/16”min)
f) Lightweight Insulating concrete over steel deck
g) Gypsum
h) Cementitious Wood Fiber