Above what moisture content is it necessary to reduce the re

Above what moisture content is it necessary to reduce the reference design values for most species of (a) sawn lumber and (b) glulam?

Solution

Answer:-

The moisture content of wood does not exceed 19%. For use condition where the moisture content will exceed 19 % the wet adjustment design value will reduce.

The checking of wood is due to differential shrinkage of the wood fibres in the inner and outer portions of a wood member. Glulam is manufactured from lamstock having a moisture content of 7 to 15 percent. Because this range approximates the moisture conditions for most end uses, checking is minimal in glulam members.