The vibration isolation curb shall be air and weather tight using an elastomeric seal, which is attached to the upper support frame with a galvanized steel clip. The seal shall extend down past the wood nailer of the lower support assembly and flash over the roof material at the wood nailer on the lower support curb.
NSMA stands for Navy Systems Management Activity (US DoD) Suggest new definition This definition appears very rarely and is found in the following Acronym Finder categories:
Official acronyms. For a comprehensive list of unit organizations in the United States Navy, see List of units of the United States Navy. 1MC - 1 Main Circuit, shipboard public address system. 3M - Maintenance and Material Management (3M System) 3MC - Maintenance Material Management Coordinator.