BS EN ISO 6185-3:2018 ISO 6185‑3:2014
5.3 Wood
5.3.1 General The types of timber and plywood shall comply with ISO 12215-3.
All exposed timber and plywood shall be given weather-tight protection, such as paint, varnish or preservative, suitable for a marine environment.
In the selection of protective coatings, national, regional and international regulations for the protection of the environment shall be followed. 5.3.2 Plywood
Plywood used may incorporate hardwoods or softwood plies and the bonding adhesive shall be water- and boil- proof and comply with EN 314-2 or equivalent.
If the wood used for plies is not hardwood, the plies shall be treated to give protection against rot, fungal decay and marine borers, and/or reinforced (laminate), where necessary. All adjoining edges and/or surfaces, including any end grain, shall be effectively sealed.
Timber used shall be seasoned and free from sapwood, decay, insect attack, splits and other imperfections likely to adversely affect the performance of the material. The timber shall be generally free from knots but an occasional sound intergrown knot is acceptable.
5.3.3 Constructional timbers Timber used in the construction shall be seasoned, and free from sapwood, shakes and other defects. 5.4 Metal parts The types of metals shall comply with the requirements of Clause 4 of ISO 12215-3:2002. 5.5 Glass‑reinforced plastics
Resins, reinforcements and laminates shall be arranged and protected against effects of the marine environment to comply with the requirements of 7.12. 5.6 Other materials Parts other than metal or wood shall comply with the requirements of Clause 6 of ISO 12215-3:2002. 5.7 Buoyant material used in foam filled buoyancy tubes 5.7.1 General Buoyant materials used in foam filled buoyancy tubes shall comply with the tests prescribed in 5.7.2 5.7.2 Tests 5.7.2.1 General
Ten samples of the buoyant material shall be subject to tests prescribed in 5.7.2.2 to 5.7.2.4. They shall be at least 300mm2 and of the same thickness as used in the buoyancy tube. The dimensions of the samples shall be recorded at the end of the 10 day cycle.
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