The timber should be sound straight and well seasoned Table 4 4 gives guidance

The timber should be sound straight and well seasoned

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Walls, floors and roofs shall be constructed of structural timber. The timber should be sound, straight and well seasoned. Table 4-4 gives guidance on the appropriate use of different species of timber. Pressure treated lumber Pressure treated lumber shall be used, where appropriate. When used, such lumber shall have an appropriate label indicating the type and level of treatment. Moisture content The moisture content shall be between 15% and 20%. 4.4.3 Steel Structural steel Steel for structural use shall be in accordance with one of the following: a) ASTM A 36 - for structural steel; or b) ASTM A 53, grade B - for welded and seamless steel pipe. Structural shapes The main characteristics of the commonly used shapes (from ASTM A 36) are given below: (a) W shapes - they have essentially parallel flange surfaces and the profile of a W shape of a given nominal depth and weight; (b) HP bearing pile shapes - they have essentially parallel flange surfaces and equal web and flange thicknesses; (c) S beams and C channels - they have a slope on their flange surfaces; (d) L angles s hapes – they have equal and unequal legs; and (e) Pipe and structural tubing. Bolts Steel bolts shall conform to one of the following: a) ASTM A307 - for low carbon steel externally and internally threaded standard fasteners; b) ASTM A325 - for high strength bolts for structural steel joints; or c) ASTM A449 - for quenched and tempered steel bolts and nuts.
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PCTTS 599: 20XX 71 4.5 Site preparation 4.5.1 Preliminary investigation General Before any construction work commences, it shall be determined whether planning permission and other approvals would be required from the relevant authorities. A preliminary inspection of the site shall be undertaken so that adequate measures can be taken to deal with any diffi culties that may arise. This site survey should also be used to plan the organization of the site so that a logical layout may emerge. Documentation Investigations shall be carried out to determine whether the following documents are available: a) planning approval from Town and Country Planning Development (TCPD); b) Certificate of Environmental Clearance from the Environmental Management Authority (EMA), where applicable; and c) survey drawing, including topographical information. Checklist for site conditions The following checklist shall be used to provide pertinent information about the site and its conditions before the start of construction: a) Does the shape and size of the plot conform to those shown on the layout plan? b) Is easy access to the site available? c) can the site can be adequately drained? d) Have all the boundary markers been located ? e) Are water, sewage disposal facilities, and an electricity supply available on site? f) Is there evidence of termite infestation in the soil or trees? g) Will there be a need for the removal of large trees?
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