For a vertically installed cast iron pipe, what is the maximum allowable distance between supports?

For a vertically installed cast iron pipe, what is the maximum allowable distance between supports?

• A. Two Story Height
• B. One Story Height
• C. Three Story Height
• D. Four Story Height

Answer: (B)

Vertical cast iron pipe needs support at consistent vertical intervals to prevent sagging and keep joints aligned under the weight of the pipe and its contents. The standard practice is to place supports at every floor level, so the maximum distance between supports equals the height of one story. This ensures the pipe remains securely supported as it passes through each level, reducing the risk of movement that could damage joints or cause leaks. In many buildings, a story height is roughly 8 to 10 feet, though the exact measurement isn’t fixed in feet—the code uses story height as the reference. Spacing beyond a single story height would leave the pipe unsupported over too large a vertical run, increasing the chance of deflection and joint issues.

Vertical cast iron pipe needs support at consistent vertical intervals to prevent sagging and keep joints aligned under the weight of the pipe and its contents. The standard practice is to place supports at every floor level, so the maximum distance between supports equals the height of one story. This ensures the pipe remains securely supported as it passes through each level, reducing the risk of movement that could damage joints or cause leaks. In many buildings, a story height is roughly 8 to 10 feet, though the exact measurement isn’t fixed in feet—the code uses story height as the reference. Spacing beyond a single story height would leave the pipe unsupported over too large a vertical run, increasing the chance of deflection and joint issues.