N.Y. Comp. Codes R. & Regs. tit. 12, § 23-5.15
Lean-to scaffolds.
(a) Limited use of lean-to scaffolds.
Lean-to scaffolds shall not be used or erected to a height exceeding 10 feet above the ground, grade or equivalent surface. Lean-to scaffolds shall be used only as light duty scaffolds.
(b) Scaffold construction.
The spread between the legs of any lean-to scaffold, measured at the feet, shall be at least equal to one-half the height of such scaffold. The maximum span for two-inch by nine-inch planking shall be 10 feet and the maximum span for one and one-quarter inch by nine-inch planking shall be six feet. The minimum sizes of members of lean-to scaffold supports shall be as specified in Table XV of this Subpart.
TABLE XV MINIMUM SPECIFICATIONS FOR LEAN–TO SCAFFOLDS
| Members | Dimensions |
|---|---|
| Horizontal bearers | 2″ × 6″ |
| Legs | 2″ × 4″ |
| Braces between legs | 1″ × 6″ |
| Gusset braces at top of legs | 1″ × 6″ |
| Half diagonal braces | 1″ × 6″ |
| Maximum spans of planking: | |
| 2″ × 9″ | 10 ft. |
| 1 ¼ ″ × 9″ | 6 ft. |