- Part Number:1915
- Part Number Title:OCCUPATIONAL SAFETY AND HEALTH STANDARDS FOR SHIPYARD EMPLOYMENT
- Subpart:1915 Subpart E
- Subpart Title:Scaffolds, Ladders and Other Working Surfaces
- Standard Number:
- Title:Scaffolds or staging.
- GPO Source:
Scope and application. The provisions of this section shall apply to all ship repairing, shipbuilding and shipbreaking operations except that paragraphs (b)(8) through (b)(10) and paragraphs (c) through (f) of this section shall only apply to ship repairing and shipbuilding operations and shall not apply to shipbreaking.
Independent pole wood scaffolds.
Minimum dimensions and spacing of members shall be in accordance with Table E-1 in § 1915.118.
Independent pole metal scaffolds.
Wood trestle and extension trestle ladders.
Ladders up to and including those 16 feet long shall have side rails of not less than 15/16 × 2¾ inch lumber.
Ladders over 16 feet long and up to and including those 20 feet long shall have side rails of not less than 15/16 x 3 inch lumber.
Ladders up to and including 12 feet long shall have side rails of not less than 15⁄16 × 2 1⁄4 inch lumber.
Ladders over 12 feet long and up to and including those 16 feet long shall have side rails of not less than 15/16 × 2½ inch lumber.
Ladders over 16 feet long and up to and including those 20 feet long shall have side rails of not less than 15/16 × 2¾ inch lumber.
Trestle ladders and base sections of extension trestle ladders shall be so spread that when in an open position the spread of the trestle at the bottom, inside to inside, shall be not less than 5½ inches per foot of the length of the ladder.
Painters' suspended scaffolds.
The supporting hooks of swinging scaffolds shall be constructed to be equivalent in strength to mild steel or wrought iron, shall be forged with care, shall be not less than ⅞ inch in diameter, and shall be secured to a safe anchorage at all times.
The ropes supporting a swinging scaffold shall be equivalent in strength to first-grade ¾ inch diameter manila rope properly rigged into a set of standard 6 inch blocks consisting of at least one double and one single block.
Stirrups shall be constructed so as to be equivalent in strength to wrought iron ¾ inch in diameter.
The side rails of ladders in ladder-type platforms shall be equivalent in strength to a beam of clear straight-grained spruce of the dimensions contained in Table E-2 in § 1915.118.
The side rails shall be tied together with tie rods. The tie rods shall be not less than 5/16 inch in diameter, located no more than 5 feet apart, pass through the rails, and be riveted up tight against washers at both ends.
The rungs shall be of straight-grained oak, ash, or hickory, not less than 1⅛ inches diameter, with ⅞ inch tenons mortised into the side rails not less than ⅞ inch and shall be spaced no more than 18 inches on centers.
Flooring strips shall be spaced no more than ⅝ inch apart except at the side rails, where 1 inch spacing is permissible.
The planks of plank-type platforms shall be of not less than 2 × 10 inch lumber.
The platform shall be no more than 24 inches in width.
The planks shall be tied together by cleats of not less than 1 × 6 inch lumber, nailed on their undersides at intervals of not more than 4 feet.
The side stringers shall be of sound, straight-grained lumber, free from knots, and of not less than 2 × 6 inch lumber, set on edge.
The platform shall be supported on cross beams of 2 × 6 inch lumber between the side stringers securely nailed thereto and spaced not more than 4 feet on centers.
The platform shall be formed of boards ⅞ inch in thickness by not less than 6 inches in width, nailed tightly together, and extending to the outside face of the stringers.
The minimum dimensions of lumber used in the construction of horses shall be in accordance with Table E-3 in § 1915.118.
Other types of scaffolds.
Scaffold or platform planking.
Except as otherwise provided in paragraphs (f)(11) and (13) of this section, platform planking shall be of not less than 2 × 10 inch lumber. Platform planking shall be straight-grained and free from large or loose knots and may be either rough or dressed.
Table E-4 in § 1915.118 shall be used as a guide in determining safe loads for scaffold planks.
Backrails and toeboards.
Rails shall be of 2 × 4 inch lumber, flat bar or pipe. When used with rigid supports, taut wire or fiber rope of adequate strength may be used. If the distance between supports is more than 8 feet, rails shall be equivalent in strength to 2 × 4 inch lumber. Rails shall be firmly secured. Where exposed to hot work or chemicals, fiber rope rails shall not be used.
When necessary, to prevent tools and materials from falling on men below, toeboards of not less than 1 × 4 inch lumber shall be provided.
Access to staging.
Access from below to staging more than 5 feet above a floor, deck or the ground shall consist of well secured stairways, cleated ramps, fixed or portable ladders meeting the applicable requirements of § 1915.72 or rigid type non-collapsible trestles with parallel and level rungs.
Access from above to staging more than 3 feet below the point of access shall consist of a straight, portable ladder meeting the applicable requirements of § 1915.72 or a Jacob's ladder properly secured, meeting the requirements of § 1915.74(d).
[47 FR 16986, Apr. 20, 1982; 67 FR 44542, July 3, 2002]