Q. Is one allowed during the three weeks to build a backyard deck that will be used for building a Suka on it? The posts for the Suka's schach will be constructed also then.
A. Horav Shlomo Miller's Shlit'a opinion is that in need it can be done during the Three Weeks, but should be avoided during the Nine Days
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Rabbi A. Bartfeld as advised by Horav Shlomo Miller and Horav Aharon Miller Shlit’a