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PERFORMANCE

Tuff Span 6.5 and 8.0 profile roof decks are designed to replace traditional metal, wood, and concrete decks as a substrate for built-up and single ply roofing membranes.

These decks, like all Tuff Span panels and decks, are made with continuous straight aligned reinforcing glass. The Tuff Span reinforcement system allows these FRP decks to perform as a permanent substrate without the creep problems associated with other glass reinforcing systems.

The load/span tables shown on the previous page are based upon full scale tests. The loads shown reflect actual deck performance under dead, live, and uplift loads.

Load Definitions

  • Dead load : material load only
  • Live load : service loads, foot traffic, etc.
  • Uplift load : uplift wind pressure minus dead load.
 
PARAMETERS AND PROPERTIES
  6.5 Deck Series 500 8.0 Deck Series 700
Moment Capacity/ft. 11,100 lb. in. 12,400 lb. in.
Stiffness El/ft. 2.32 x 1,000,000 lb. inches squared 5.85 x 1,000,000 lb. inches squared
Fastener Pullover 580 lb./festener (.729" washer) 850 lb./fastener (1.125" washer)
Nominal Thickness 0.85" .10"
Weight/SF 1.0 lb. 1.375 lb.
Flexural Strength / ASTM D-790 55,000 psi 55,000 psi
Flexural Modulus / ASTM D-790 2.4 x 1,000,000 psi 2.4 x 1,000,000 psi
Tensile Strength / ASTM D-790 42,000 psi 42,000 psi
Shear Strength / ASTM D-732 4,500 psi 4,500 psi
Barcol Hardness / ASTM D-2583 50 50
Coeeficient of Thermal Expansion / ASTM D-696 8 X 1,000,000 in/in°F 8 X 1,000,000 in/in°F
 
FM APPROVALS WINDSTORM CLASSIFICATIONS (See Note 1)
  6.5 Deck Series 500 8.0 Deck Series 700
FM Windstorm Classification Class 90 Class 90
Maximum Span 6'3" 8'0"
Deflection Limit L/240 (See Note 2) L/240 (See Note 2)
Structural Fastener Spacing 6.5" o.c. at every support 8" o.c. at every support
Side Lap Fastener Spacing 18" o.c. 24" o.c.
Structural Fasteners, Type B #14 .729" dia., 21 ga. SS Washer 1.125" dia., 18 ga. Hex Head Washer
N-C Insulation Fasteners 18 Fasteners per 4' x 8' Board or 1 per 1.78 SF
Insulation Rigid Polyiso Board, 1.3" Min. Thickness
BUR Glass Felt 3 Ply Minimum 
Windstorm Classification Notes:
1) Assemblies are Specification Tested per FM Approvals Simulated Wind Uplift Test Procedure, Standard 4450.
2) Deflection limit is L/240 under a 300 lb. concentrated load on a 1 SF area at midspan per Standard 4451.
 
6.5 Series 500 and 8.0 Series 700 decks also have U.L. Class 90 Wind Uplift listings.
 
Fire Classification Notes:
1) Automatic sprinklers are required for Class 2 decks.
2) A roof assembly with Tuff Span 6.5 deck has obtained FM Approval for Class 1 Fire and Class 1-90 Windstorm Classification. See the current edition of the FM Approvals Guide or contact Enduro Systems for approved assembly construction.
 
GUIDE SPECIFICATIONS

Part 1 - General
Tuff Span products establish a minimum of quality required.

Part 2 - Products

Roof deck units shall be Tuff Span in one of the following profiles:

Tuff Span 6.5 Roof Deck, Series 500

Tuff Span 8.0 Roof Deck, Series 700.

2.01 Glass fiber reinforcement shall be continuous and oriented in two (2) directions (along the length and width of unit). Each unit shall be a minimum of 47% glass by weight.

2.02 Units shall be made from Vinyl Ester resins, and shall have a flame spread rating of 25 or less when tested in accordance with ASTM E-84.

2.03 Structural Parameters Roof deck units shall meet the specified spans and positive and negative load capacities. Performance criteria shall be determined by full-scale tests which represent combined stress and elastic stability conditions. The following design criteria and Factors of Safety (FOS) shall be analyzed and met:

Deflection (max.) under dead loads = L/360, FOS = 5;

Deflection (max.) under dead + temporary loads = L/240, FOS = 2.5;

Deflection (max) under wind uplift loads (= wind uplift-dead loads) = L/180, FOS = 1.88.

Fastener pullover minimums must account for combined stresses from the hole and from the fastener itself.

Part 3 - Execution

3.01 Installation of Insulation Materials

3.02.01 Rigid insulation material may be attached to the FRP roof deck units with mechanical fasteners or hot bituminous roofing adhesives ("hot mopped").

3.02.02 Mechanical fasteners must be "positive lock" type - no screws are allowed. Contact Enduro for recommended fasteners and fastening procedures.

3.02.03 Care must be taken when using hot roofing adhesives on FRP roof deck units. Temperature of adhesives should not exceed the maximum values set by the National Roofing Contractors Association (Hark 1989).
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