Horizontal steel pipe shall be supported at 8 feet for 1 1/4 inch and smaller and 12 feet for 1/2 inch and larger.

Horizontal steel pipe shall be supported at 8 feet for 1 1/4 inch and smaller and 12 feet for 1/2 inch and larger.

• A. True
• B. False
• C. Only indoors
• D. Not specified

Answer: (A)

Spacing for horizontal steel pipe is guided by how stiff the pipe is at a given diameter. Smaller pipes are less stiff and tend to sag more between supports, so they need supports closer together. Larger pipes are stiffer and can span longer between supports, so they can be spaced farther apart. The rule in this item reflects that: smaller sizes require about eight-foot spacing, while larger sizes can be spaced about twelve feet apart. This is a common code-table guideline, so the statement aligns with typical practice. Always refer to the current code table for exact cutoffs, but the concept and the given spacing are correct.

Spacing for horizontal steel pipe is guided by how stiff the pipe is at a given diameter. Smaller pipes are less stiff and tend to sag more between supports, so they need supports closer together. Larger pipes are stiffer and can span longer between supports, so they can be spaced farther apart. The rule in this item reflects that: smaller sizes require about eight-foot spacing, while larger sizes can be spaced about twelve feet apart. This is a common code-table guideline, so the statement aligns with typical practice. Always refer to the current code table for exact cutoffs, but the concept and the given spacing are correct.