29 CFR 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) 71⁄2 71⁄2 71⁄2 7 7 7

Pole spacing—transversely (in feet) 61⁄2 min 71⁄2 min 81⁄2 min 61⁄2 10 10

Ledger spacing—vertically (in feet) 7 7 7 41⁄2 41⁄2 41⁄2

Table E-2—Specifications for Side Rails of Ladders

Length (in feet) Cross section (in inches)

At ends At center

15 17⁄8 × 23⁄4 17⁄8 × 33⁄4

16 17⁄8 × 23⁄4 17⁄8 × 33⁄4

18 17⁄8 × 3 17⁄8 × 4

20 17⁄8 × 3 17⁄8 × 4

24 17⁄8 × 3 17⁄8 × 41⁄2

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 15⁄8 × 91⁄2 2 × 12 15⁄8 × 111⁄2 3 × 8 25⁄8 × 71⁄2 3 × 10 25⁄8 × 91⁄2 3 × 12 25⁄8 × 111⁄2

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 33⁄4

3⁄4 4 5 41⁄2

7⁄8 4 5 51⁄4

1 4 6 6

11⁄8 5 6 63⁄4

11⁄4 5 7 71⁄2

13⁄8 6 7 81⁄4

11⁄2 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

11⁄8 7⁄32

11⁄4 1⁄4

13⁄8 9⁄32

11⁄2 5⁄16

13⁄4 11⁄32