BS ISO 799-1:2019 pdf free
BS ISO 799-1:2019 pdf free.Ships and marine technology – Pilot ladders Part 1: Design and specification.
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4 Materials
4.1 Wooden parts
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 coefficient or hide the natural grain.
4.2 Side ropes
4.2.1 General arrangement
Each side rope shall be mildew-resistant manila rope meeting ISO 1181:2004. Quality 1, or a spun thermoset polyester rope with a polypropylene core of a colour that contrasts with the spun polyester.
5 Construction
5.1 Figure 1A provides construction detalls for pilot ladders.
5.2 Each step in the ladder shall be supported by side ropes. Each side of the ladder shall consist of a continuous ioop of rope with the joint above the top step or below the bottom step.
5.3 Each of the side ropes shall:
a) be wholly continuous rope without any knots, joints or splices except as specified in 5A.
b) not be painted or otherwise coated or covered.
5.4 Unless a special arrangement is needed to secure the ladder to an accommodation ladder, pilot ladder winch reel, or other custom installation, the ends of the side ropes shall be finished as follows.
a) If the ends of the side ropes terminate just above the top step (highest step), they shall round a thimble and the end shall be joined with a short splice.
b) The side ropes shall not have fittings or form loops at the bottom of the ladder that can be used to attach additional ladder sections or tripping lines.
c) If the ends of the side ropes on each side terminate just beneath the lowest step, the rope ends shall be securely fastened or otherwise treated to prevent fraying. The rope ends shall pass through the holes in the lowest step and use similar step fixtures as the other steps. A rope seizing, as per the other steps, shall be made immediately under step fixtures. A second rope seizing shall be provided 60 mm under the first seizing, see Figure 113. The loose ends of the rope shall be whipped as close as possible to the second rope seizing to protect against fraying. An accepted method is a 25 mm whipping. The loose ends of the rope shall be as short as possible, but not less than 50 mm below the second seizing and under no circumstances can loops be allowed.
d) The ends of each side rope, which do not terminate in a splice or fitting, shall be served, whipped or otherwise treated to prevent fraying.BS ISO 799-1 pdf free download.
