• Part Number:
    1915
  • Part Number Title:
    Occup. Safety and Health Standards for Shipyard Employment
  • Subpart:
    1915 Subpart G
  • Subpart Title:
    Gear and Equipment for Rigging and Materials Handling
  • Standard Number:
  • Title:
    Tables.
  • GPO Source:

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 7 7
Pole spacing—transversely (in feet) 6½ min 7½ min 8½ min 10 10
Ledger spacing—vertically (in feet) 7 7 7

Table E-2—Specifications for Side Rails of Ladders

Length (in feet) Cross section (in inches)
At ends At center
15 1⅞ × 2¾ 1⅞ × 3¾
16 1⅞ × 2¾ 1⅞ × 3¾
18 1⅞ × 3 1⅞ × 4
20 1⅞ × 3 1⅞ × 4
20 1⅞ × 3 1⅞ × 4½

Table E-3—Specifications for the Construction of Horses

Structural members Height in feet
≤10 >10≤16 >10≤16
  inches inches inches
Legs 2 × 4 3 × 4 4 × 6
Bearers or headers 2 × 6 2 × 8 4 × 6
Crossbraces 2 × 4 2 × 6 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 1⅝ × 9½ 2 × 12 1⅝ × 11½ 3 × 8 2⅝ × 7½ 3 × 10 2⅝ × 9½ 3 × 12 2⅝ × 11½
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)      
½ 3 4 3
3 4
¾ 4 5
4 5
1 4 6 6
1⅛ 5 6
5 7
1⅜ 6 7
6 8 9

1 Three clips shall be used on wire size less than ½ -inch diameter.

Table G-2—Maximum Allowable Wear at Any Point of Link

Chain size in inches Maximum allowable wear in fraction of inches
¼ (9/32) 3/64
5/64
½ 7/64
9/64
¾ 5/32
11/64
1 3/16
1⅛ 7/32
¼
1⅜ 9/32
5/16
11/32

[61 fr 26321, May 24, 1996; 67 FR 44543, July 3, 2002; 76 FR 33610, July 8, 2011]