Standard Hollow Metal Door Sizes

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Steel Door Institute    

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The Steel Door Institute (SDI) was established in 1954 as a voluntary, unincorporated, non-profit business association whose mission is to …

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常见问题解答

问:
What is the acceptable gap between leaves on a pair of exterior steel doors?
答:
For clearances for meeting edges and undercuts for non-rated and fire rated applications.
答:
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