Design Values

Load Tables




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Load Tables

The table below provides allowable loads for random length continuous applications and simple spans.

Allowable Total Uniform Roof Load (contd.)

1. Values followed by (f) are goverened by bending stress. Allowable loads for floors where governed by deflection are half of those listed in the 1/180 column.
2. Bending stress relates to 2-month duration. It is not exceeded when the listed loads are applied based on recognized decking formulas.
3. Span/loads shown assume compliance to layup rules described elsewhere. Longer spans may require specific lengths differing from the standard shipment--consult your Disdero representative.
4. Nominal 5 Fir/Larch will have a MOE of 1.7 x 106 psi unless special arrangements are made prior to manufacture.
5. Comparable values are obtained with Ponderosa Pine face and Douglas Fir/Larch centers and back.

Random Length Continuous-- A random length continuous configuration is applied over three or more spans. It is the most common method of applying Lock-Deck™ decking and the most economical. This configuration allows the use of mixed lengths of material on a variety of span conditions, providing high structural efficiency as well as attractive appearance.

Simple Spans-- This configuration requires specified length decking and provides shorter spans for the same thickness decking than the random length layout.

Sloped Roof Deck -- Load Adjustment Factors (Estimated)

To calculate the allowable load for a sloped roof deck, apply the coefficient for the pitch to the load for a flat roof listed in the Allowable Load table above.

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Mail: DISDERO LUMBER CO. 12301 SE Carpenter Dr, Clackamas, OR 97015
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