|
The provisions of this section apply to ship repairing, shipbuilding and shipbreaking.
Table E-1 - Dimensions and Spacing of Wood Independent-Pole Scaffold
Members
____________________________________________________________________
|
| Light duty (Up to 25 pounds
| per square foot)-Height in feet
Structural members |____________________________________
| | |
| <24 | >24<40 | >40<60
_______________________________|____________|____________|__________
| | |
Poles or uprights (in inches)..| 2x4 | 3x4 or 2x6 | 4x4
Bearers (in inches) ...........| 2x6 | 2x6 | 2x6
Ledgers (in inches) ...........| 2x6 | 2x6 | 2x6
Stringers (not supporting | | |
bearers) (in inches) .........| 1x6 | 1x6 | 1x6
Braces (in inches) ............| 1x4 | 1x6 | 1x6
Pole spacing-longitudinally | | |
(in feet) ....................| 7 1/2 | 7 1/2 | 7 1/2
Pole spacing-transversely | | |
(in feet) ....................| 6 1/2 min | 7 1/2 min |8 1/2 min
Ledger spacing-vertically | | |
(in feet) ....................| 7 | 7 | 7
Poles or uprights (in inches)..| 3x4 | 4x4 | 4x6
Bearers (in inches) ...........| 2x8 | 2x8 | 2x10
Ledgers (in inches) ...........| 2x8 | 2x8 | 2x8
Stringers (not supporting | | |
bearers) (in inches) .........| 1x6 | 1x6 | 1x6
Braces (in inches) ............| 1x6 | 1x6 | 1x6
Pole spacing-longitudinally | | |
(in feet) ....................| 7 | 7 | 7
Pole spacing-transversely | | |
(in feet) ....................| 6 1/2 | 10 | 10
Ledger spacing-vertically | | |
(in feet) ....................| 4 1/2 | 4 1/2 | 4 1/2
_______________________________|____________|____________|__________
Table E-2 - Specifications for Side Rails of Ladders
______________________________________________________
|
| Cross section (in inches)
Length (in feet) |___________________________________
| |
| At ends | At center
__________________|________________|__________________
| |
15 ...............| 1 7/8 x 2 3/4 | 1 7/8 x 3 3/4
16 ...............| 1 7/8 x 2 3/4 | 1 7/8 x 3 3/4
18 ...............| 1 7/8 x 3 | 1 7/8 x 4
20 ...............| 1 7/8 x 3 | 1 7/8 x 4
24 ...............| 1 7/8 x 3 | 1 7/8 x 4 1/2
__________________|________________|__________________
Table E-3 - Specifications for the Construction of Horses
__________________________________________________________
|
| Height in feet
Structural members |___________________________________
| | |
| <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
______________________|____________|__________|__________
Table E-4 - Safe Center Loads for Scaffold Plank of
1,100 Pounds Fibre Stress
________________________________________________________________
|
Span | Lumber dimensions in inches
in |_________________________________________________________
feet | | | | | |
| A | B | A | B | A | B
______|______|__________|______|_________|_____|________________
| | | | | |
| 2x10 | 1 5/8 x | 2x12 | 1 5/8 x | 3x8 | 2 5/8 x 7 1/2
| | 9 1/2 | | 11 1/2 | |
|______|__________|______|_________|_____|________________
| | | | | |
6 ....| 256 | | 309 | | 526 |
8 ....| 192 | | 232 | | 395 |
10 ...| 153 | | 186 | | 316 |
12 ...| 128 | | 155 | | 263 |
14 ...| 110 | | 133 | | 225 |
16 ...| | | 116 | | 197 |
6 ....| 667 | | 807 | | |
8 ....| 500 | | 605 | | |
10 ...| 400 | | 484 | | |
12 ...| 333 | | 404 | | |
14 ...| 286 | | 346 | | |
16 ...| 250 | | 303 | | |
______|______|__________|______|_________|_____|_________________
Footnote(A) Rough lumber.
Footnote(B) Dressed lumber.
Table G-1 - NUMBER AND SPACING OF U-BOLT WIRE ROPE CLIPS
____________________________________________________________________
| |
| Number of clips |
Improved plow steel, |_____________________| Minimum spacing,
rope diameter, inches | Drop | Other | inches
| forged | 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
1/2 - inch diameter.
TABLE G-2 - MAXIMUM ALLOWABLE WEAR AT
ANY POINT OF LINK
____________________________________
|
| Maximum
| allowable
Chain size in inches | 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
_______________________|____________
[61 fr 26321, May 24, 1996; 67 FR 44543, July 3, 2002; 76 FR 33610, July 8, 2011]
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Regulations (Standards - 29 CFR) - Table of Contents