Code of practice for structural use of timber -
Part 3: Permissible stress design of glued
laminated timber
(First revision)
This Malaysian Standard provides the guidelines on the structural use of glued laminated timber
in include recommendation on quality, grade stresses and modification factors applicable to this
material when use as a simple member or as part of build-up components or as part of structure
incorporating other materials. It also gives recommendation for design of mechanical and glued
connections and it includes general advice on workmanship.
NOTES:
1. The stresses given in this part of MS 544 apply only to timber graded in accordance with BS 5756 or
equivalent with respect to structural tropical hardwoods. As this standard is primarily for solid structural
timber, manufacturers of glued laminated timber may need to specify overriding requirements for wane,
fissures and distortion. In deriving the recommended stress for timber, estimates of 5 % lower exclusion
values of the strength and stiffness were used. Furthermore, the modulus of elasticity values no longer
included element due to shear.
2. Grade and species for glulam that satisfy the requirement for strength classes are given in Table 1.
Glulam strength properties may be determined from the strength class properties given in Table 2.
