ISO799 is an international standard of <Ships and marine technology — Pilot ladders>, there has 2 parts IS0799-1 Part 1: Design and Specification and ISO799-2 Part 2: Maintenance, use, survey, and inspection.
1. Design and Specification ISO209, Aluminum and aluminum Alloy, for aluminum alloy ferrule ISO877, Plastic, for plastic chock ISO1181, Fibre ropes, for Manila and Sisal Ropes ISO1461, Hot dip galvanized coatings on fabricated iron and steel articles, for Thimble ISO15510, Stainless Steel, for Thimble Wooden Steps Each wooden part shall be made of hardwood (ash, oak, beech, teak, and other hardwood having equivalent properties free from knots. Wood shall not be treated or coated with paint, varnish or other coatings, which either change the friction coeficient or hide the natural grain. Side ropes Each side rope shall be mildewresistant manila rope meeting ISO1181:2004, Quality 1, or a spun thermoset polyester rope with a polypropylene core of a colour that contrasts with the spun polyester. Each side rope shall have a breaking strength of at least 24 kN, and the speciication of the diameter of side ropes should be 20 mm (63 mm circumference). Metallic materials Each metal fastener shall be made of material which is inherently corrosionresistant, or treated to be corrosion-resistant. Each ferrous metal part, which is not stainless steel, shall be coated in accordance with SO 1461 Each stainless steel part shall be of a marine grade alloy with a corrosion resistance at least equal to grade “4401-316-00I” in ISO 15510:2014. Each aluminium part shall be 5 254 alloy, or other grade containing not more than 0,06 copper, in accordance with ISO 209:2007. Metals in contact with each other shall be galvanically compatible, or insulated to prevent galvanic corrosion in a marine environment. Step Fixtures Step ixtures for securing each step of a ladder shall have rope seiing or purpose made arrangement such as solid nylon clamp blocks or hardwood clamp blocks to prevent the fasteners from loosening. Cable ties, u-clamps, worm driven clips are unacceptable. Plastic materials Each plastic material shall be of a type that retains at least 30% of its original tensile strength andat least 80% of its original impact strength when subjected to the oneyear outdoor weathering test described in Method A of ISO 877-2:2009. Quality of materials Each part of a ladder shall be free of splinters, burrs, sharp edges, corners, projections, or other defects that could injure a person using the ladder. Rope seizing Seizing, shall consist of threeply tarred marline of minimum breaking strength 800 N, and with a minimum diameter of 4 mm, or other suitable material of equivalent strength and diameter All seizings shall be Figure-of-eight racking seiings, minimum length of seiing 32 mm. Contruction