['Materials Handling and Storage']
['Materials Handling and Storage']
12/12/2023
Copyright 2024 J. J. Keller & Associate, Inc. For re-use options please contact copyright@jjkeller.com or call 800-558-5011.
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The provisions of this section apply to ship repairing, shipbuilding and shipbreaking.
| Structural members | Light duty (Up to 25 pounds per square foot)-Height in feet | Heavy duty (25 to 75 pounds per square foot) Height in feet. | ||||
| ≤24 | 2>4≤40 | >40≤60 | ≤24 | 2>4≤40 | >40≤60 | |
| Poles or uprights (in inches) | 2x4 | 3x4 or 2x6 | 4x4 | 3x4 | 4x4 | 4x6 |
| Bearers (in inches) | 2x6 | 2x6 | 2x6 | 2x8 | 2x8 | 2x10 |
| Ledgers (in inches) | 2x6 | 2x6 | 2x6 | 2x8 | 2x8 | 2x8 |
| Stringers (not supporting bearers) (in inches) | 1x6 | 1x6 | 1x6 | 1x6 | 1x6 | 1x6 |
| Braces (in inches) | 1x4 | 1x6 | 1x6 | 1x6 | 1x6 | 1x6 |
| Pole spacing-longitudinally (in feet) | 7½ | 7½ | 7½ | 7 | 7 | 7 |
| Pole spacing-transversely (in feet) | 6½ min | 7½ min | 8½ min | 6½ min | 10 | 10 |
| Ledger spacing-vertically (in feet) | 7 | 7 | 7 | 4 ½ | 4 ½ | 4 ½ |
| Length (in feet) | Cross section (in inches) | |
| At ends | At center | |
| 15 | 1 7/8 × 2 3/4 | 1 7/8 × 3 3/4 |
| 16 | 1 7/8 × 2 3/4 | 1 7/8 × 3 3/4 |
| 18 | 1 7/8 × 3 | 1 7/8 × 4 |
| 20 | 1 7/8 × 3 | 1 7/8 × 4 |
| 24 | 1 7/8 × 3 | 1 7/8 × 4 1/2 |
| Structural members | Height in feet | ||
| ≤10 | >10≤16 | 16≤20 | |
| Inches | inches | inches | |
| Legs | 2 x 4 | 3 x 4 | 4 x 6 |
| Bearers or headers | 2 x 6 | 2 x 8 | 4 x 6 |
| Crossbraces | 2 x 4 | 2 x 4 | 2 x 6 |
| Or | |||
| 1 x 8 | |||
| Longitudinal braces | 2 x 4 | 2 x 6 | 2 x 6 |
| Span in feet | Lumber dimensions in inches | |||||||||
| A | B | A | B | A | B | A | B | A | B | |
| 2x10 | 1 5/8 x 9 ½ | 2x12 | 1 5/8x11 1/2 | 3x8 | 2 5/8x 7 /12 | 3x10 | 2 5/8x 9 ½ | 3x12 | 2 5/8x 11 ½ | |
| 6 | 256 | 309 | 526 | 667 | 807 | |||||
| 8 | 192 | 232 | 395 | 500 | 605 | |||||
| 10 | 153 | 186 | 316 | 400 | 484 | |||||
| 12 | 128 | 155 | 263 | 333 | 404 | |||||
| 14 | 110 | 133 | 225 | 286 | 346 | |||||
| 16 | 116 | 197 | 250 | 303 | ||||||
| Footnote(A) Rough lumber. Footnote(B) Dressed lumber. | ||||||||||
| Improved plow steel, rope diameter, inches | Number of clips | Minimum spacing, inches | |
| Drop forged | Other Material | ||
| (1) | |||
| 1/2 | 3 | 4 | 3 |
| 5/8 | 3 | 4 | 3 3/4 |
| 3/4 | 4 | 5 | 4 1/2 |
| 7/8 | 4 | 5 | 5 1/4 |
| 1 | 4 | 6 | 6 |
| 1 1/8 | 5 | 6 | 6 3/4 |
| 1 1/4 | 5 | 7 | 7 1/2 |
| 1 3/8 | 6 | 7 | 8 1/4 |
| 1 1/2 | 6 | 8 | 9 |
| Footnote(1) Three clips shall be used on wire size less than ½- inch diameter. | |||
| Chain size in inches | Maximum allowable wear in fractions of inches |
| 1/4 (9/32) | 3/64 |
| 3/8 | 5/64 |
| 1/2 | 7/64 |
| 5/8 | 9/64 |
| 3/4 | 5/32 |
| 7/8 | 11/64 |
| 1 | 3/16 |
| 1 1/8 | 7/32 |
| 1 1/4 | 1/4 |
| 1 3/8 | 9/32 |
| 1 1/2 | 5/16 |
| 1 3/4 | 11/32 |
[67 FR 44542 July 3, 2002; 76 FR 33610 June 8, 2011]
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['Materials Handling and Storage']
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Copyright 2024 J. J. Keller & Associate, Inc. For re-use options please contact copyright@jjkeller.com or call 800-558-5011.