(Listed lumber sizes are those required for the specified spans; other sizes may be used for different spans, if equivalent strength is provided.)

Interior

Light Trades

Heavy Trades

Uprights for scaffolds not over 20'in height

2″x4″

2″x4″

4″x4″

Uprights for scaffolds 20' to 60'in height

3″x4″

3″x4″

4″x6″

Ribbons directly under ledgers

1″x6″

1″x6″

1″x6″

Ledgers

2″x10″

2--1″x6″

2--1″x6″ or 1--2″x6″

Spacing uprights, transverse, at right angles to platform planks

10′

3′ in clear

4′ in clear

Spacing uprights, longitudinal, parallel to direction of platform planks

10′

10′

7′

Spacing ribbons or ledgers, vertical

7′ 0″ max.

7′ 0″ max.

7′ 0″ max.

Splice pieces 48″ long

(for uprights)

2--1″x4″ or (2--2″x4″)

2--1″x4″ or (2--2″x4″)

2--2″x4″

Braces

1″x6″

1″x6″

1″x6″

Railing

2″x4″

2″x4″

2″x4″

Toeboard

1″x4″

1″x4″

1″x4″

Width of platform

10′

3′ max.

4′ max.

Planking

2″ thick and at least 10″ wide

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

History

1. Repealer and new section filed 11-14-75; effective thirtieth day thereafter (Register 75, No. 46).

2. Amendment filed 3-19-79; effective thirtieth day thereafter (Register 79, No. 12).