- Crawling boards must be secured to the roof by Ridge hooks.
- By means that provide equivalent strength and durability.
- Crawling boards must extend from the roof peak to the eaves when used in roof construction.
- Crawling boards must be not less than 10 inches wide and 1 inch thick.
- Have a minimum cross-sectional area of 1 x 1½ inches.
- Be spaced at equal intervals not to exceed 24 inches.
- Cleats on crawling boards must.
- Be equal in length to the width of the board.
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