TYPES OF DEFECTS IN TIMBER Types of Defects in timber are grouped into the following divisions. 1. Defects due to conversion During the process of converting timber to commercial form, the following defects may occur. Chip mark: mark or sign placed by chip on finished surface of timber Diagonal grain: Due to improper sawing of … Read more
Seasoning of Timber When a tree is newly felled, it contains about 50% or more of its own weight as water. This water is in the form of sap and moisture. The water is to be removed before the timber can be used for any engineering purpose. In other words, the timber is to be … Read more
Objective For determination of specific gravity of timber. Reference Standards IS : 1708 (Part 2)-1986 Equipment & Apparatus Balance(0-10kg) Oven(3000C) Preparation of sample The dimension of sample to be tested is 6 cm in length and 2 x 2 cm in cross-section or 15 cm in length and 5 x 5 cm in cross-section. Procedure … Read more
Objective For determination of moisture content of timber. Reference Standards IS : 1708 (Part 1)-1986 Equipment & Apparatus Balance(0-10 kg) Oven (3000c) Preparation of sample: The dimension of sample to be tested is 2.5 cm in length and 2 x 2 cm or 5 x 5 cm in cross-section. Procedure The sample is weighed (W1) … Read more