Title 29
SECTION 1915.118
1915.118 Tables.
§ 1915.118 Tables.The provisions of this section apply to ship repairing, shipbuilding and shipbreaking.
Table E-1 - Dimensions and Spacing of Wood Independent-Pole Scaffold Members
| 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 | >24≤40 | >40≤60 | ≤24 | >24≤40 | >40≤60 | |
| Poles or uprights (in inches) | 2 × 4 | 3 × 4 or 2 × 6 | 4 × 4 | 3 × 4 | 4 × 4 | 4 × 6 |
| Bearers (in inches) | 2 × 6 | 2 × 6 | 2 × 6 | 2 × 8 | 2 × 8 | 2 × 10 |
| Ledgers (in inches) | 2 × 6 | 2 × 6 | 2 × 6 | 2 × 8 | 2 × 8 | 2 × 8 |
| Stringers (not supporting bearers) (in inches) | 1 × 6 | 1 × 6 | 1 × 6 | 1 × 6 | 1 × 6 | 1 × 6 |
| Braces (in inches) | 1 × 4 | 1 × 6 | 1 × 6 | 1 × 6 | 1 × 6 | 1 × 6 |
| Pole spacing - longitudinally (in feet) | 7 1/2 | 7 1/2 | 7 1/2 | 7 | 7 | 7 |
| Pole spacing - transversely (in feet) | 6 1/2 min | 7 1/2 min | 8 1/2 min | 6 1/2 | 10 | 10 |
| Ledger spacing - vertically (in feet) | 7 | 7 | 7 | 4 1/2 | 4 1/2 | 4 1/2 |
Table E-2 - Specifications for Side Rails of Ladders
| 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 |
Table E-3 - Specifications for the Construction of Horses
| Structural members | Height in feet | ||
|---|---|---|---|
| ≤10 | >10≤16 | 16≤20 | |
| inches | inches | inches | |
| Legs | 2 × 4 | 3 × 4 | 4 × 6 |
| Bearers or headers | 2 × 6 | 2 × 8 | 4 × 6 |
| Crossbraces | 2 × 4 | 2 × 4 | 2 × 6 |
| or | |||
| 1 × 8 | |||
| Longitudinal braces | 2 × 4 | 2 × 6 | 2 × 6 |
Table E-4 - Safe Center Loads for Scaffold Plank of 1,100 Pounds Fibre Stress
| Span in feet | Lumber dimensions in inches | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| A | B | A | B | A | B | A | B | A | B | |
| 2 × 10 | 1 5/8 × 9 1/2 | 2 × 12 | 1 5/8 × 11 1/2 | 3 × 8 | 2 5/8 × 7 1/2 | 3 × 10 | 2 5/8 × 9 1/2 | 3 × 12 | 2 5/8 × 11 1/2 | |
| 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 | ||||||
(A) - Rough lumber.
(B) - Dressed lumber.
Table G-1 - Number and Spacing of U-Bolt Wire Rope Clips
| 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 |
1 Three clips shall be used on wire size less than 1/2-inch diameter.
Table G-2 - Maximum Allowable Wear at Any Point of Link
| Chain size in inches | Maximum allowable wear in fraction 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 |