Tag Archive for Tag: Timber

Tag: Timber Timber Fabrication and Erection

During fabrication and erection processes for wood construction, wood products should be handled and covered to prevent marring of the surfaces and moisture absorption. Overstressing of members and joints during handling and erection should be avoided. Competent inspectors should check materials and workmanship. Fabrication of Structural Timber Fabrication consists of boring, cutting, sawing, trimming, dapping, routing, planing, and otherwise shaping, framing, and finishing wood

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Tag: Timber Timber Decking

For glued-laminated decking, two or more pieces of lumber are laminated into a single decking member, usually with nominal thickness of 2, 3, or 4 in. Other thicknesses may also be available. There are no consensus standards for gluedlaminated decking. Decking manufacturers should be consulted for design information. Solid-sawn decking usually is fabricated with edges tongued and grooved, shiplap, or groove cut for splines,

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Tag: Timber Design Values for Lumber and Timber

Design values for an extensive range of sawn lumber and timber are tabulated in the supplement to the ‘‘National Design Specification for Wood Construction,’’ (NDS), American Forest & Paper Association (AF&PA). Lumber Design values for lumber are contained in grading rules established by the National Lumber Grades Authority (Canadian), Northeastern Lumber Manufacturers Association, Northern Softwood Lumber Bureau, Redwood Inspection Service, Southern Pine Inspection Bureau, West

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Tag: Timber Uses of Timber

Timber is used for the following works: 1. For heavy construction works like columns, trusses, piles. 2. For light construction works like doors, windows, flooring and roofing. 3. For other permanent works like for railway sleepers, fencing poles, electric poles and gates. 4. For temporary works in construction like scaffolding, centering, shoring and strutting, packing of materials. 5. For decorative

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Tag: Timber Preservation of Timber

Preservation of timber means protecting timber from fungi and insects attack so that its life is increased. Timber is to be seasoned well before application of preservatives. The following are the widely used preservatives: 1. Tar 2. Paints 3. Chemical salt 4. Creosote 5. ASCO 1. Tar Hot coal tar is applied to timber with brush. The coating of tar

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Tag: Timber Defects in Timber

Various defects which are likely to occur in timber may be grouped into the following three: (i) Due to natural forces (ii) Due to defective seasoning and conversions. (iii) Due to attack by fungi and insects. (i) Defects due to Natural Forces: The following defects are caused by natural forces: (a) Knots (b) Shakes (c) Wind cracks (d) Upsets (a)

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Tag: Timber Seasoning of Timber

This is a process by which moisture content in a freshly cut tree is reduced to a suitable level. By doing so the durability of timber is increased. The various methods of seasoning used may be classified into: (i) Natural seasoning (ii) Artificial seasoning. (i) Natural Seasoning: It may be air seasoning or water seasoning. Air seasoning is carried out

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Tag: Timber Classification of Timber

Various bases are considered for the classification of timbers. The following are the important basis: (i) Mode of growth (ii) Modulus of elasticity (iii) Durability (iv) Grading (v) Availability. (i) Classification Based on Mode of Growth: On the basis of mode of growth trees are classified as (a) Exogeneous and (b) Endogeneous (a) Exogeneous Trees: These trees grow outward by adding distinct

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Tag: Timber Timber

Timber refers to wood used for construction works. In fact the word timber is derived from an old English word ‘Timbrian’ which means ‘to build’. A tree that yields good wood for construction is called ‘Standing Timber.’ After felling a tree, its branches are cut and its stem is roughly converted into pieces of suitable length, so that it can be transported to

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