How do I properly strap flex duct to avoid "sag" and restricted airflow?

Support flex duct at intervals not exceeding 4 feet . The support straps must be at least 1\frac{1}{2} inches wide to distribute the weight across the jacket. Keep the maximum allowable sag between hangers under \frac{1}{2} inch per foot of support span to prevent airflow choking.

['Support flex duct at intervals not exceeding 4 feet . The support straps must be at least 1\\frac{1}{2} inches wide to distribute the weight across the jacket. Keep the maximum allowable sag between hangers under \\frac{1}{2} inch per foot of support span to prevent airflow choking.']

Flex Duct, Boots, Collars & Grilles 2nd Year YELLOW

Stop if

Use this as training guidance. The foreman, approved drawings, project specs, manufacturer installation instructions, employer safety policy, and AHJ/code requirements always control the final answer.

Steps

Support flex duct at intervals not exceeding 4 feet. The support straps must be at least 1\frac{1}{2} inches wide to distribute the weight across the jacket. Keep the maximum...

Say this to your foreman

how do i properly strap flex duct to avoid "sag" and restricted airflow?

More in Flex Duct, Boots, Collars & Grilles