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Timber Engineering

What should be the Roof slope to prevent Ponding?

As per standards, the Roof beams should have a continuous upward slope equivalent to 1/4 in/ft ( 20.8 mm/m) between a drain and the high point of a roof, in addition to minimum recommended camber to avoid ponding.

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What are Radial Stresses and Curvature Factor?

For a constant cross sectional the radial stress induced by a bending moment in a member is calculated by using this formula

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What are the Adjustment Factors to be done in Design Values?

Their is always some variation in the design values calculated in timber. Therefore we need to apply the required adjustment to them.

Case- Extreme Fiber Bending

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How to Check Timber Under both Bending and Axial Load?

The members which are under the combined effect of axial as well as bending load should satisfy the following equation

Pa/P +Ma /M < 1

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What is the Allowable Unit Stress in Timber Columns?

Timber coloums are seldom used singly. Mostly they are a group of lumber which are stick together to form a single member. The allowable unit stress on timber is calculated by using the following formula


When the Columns have square or rectangular cross section

When the Columns have circular cross section

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