Lath and plaster fire rating. in that case the fire rating would be the block itself.

Lath and plaster fire rating. Plaster permits a great deal of design flexibility, combined with fire performance, strength and durability. Per the 2018 International Building Codes (including CA Title Use of fire walls to create separate buildings is now limited to only the determination of permissible types of construction based on allowable building area and height. Lath and plaster ceilings have a major role in preventing fire spread. I didn't see a close approximation in the tables found in OBC 721. I think you may end up doing 1 or 2 layers of rated drywall depending on local fire codes. However, no guarantee of the accu- racy or completeness of the information The Guideline on Fire Ratings of Archaic Materials and Assemblies focuses upon the fire-related performance of archaic construction. I often get calls about specific fire rating details: Do I have to install this backer piece behind my control joint? Do butt joints have to be staggered? Is it OK to run wallboard vertically rather than horizontally? 2501. While modern fire-rated drywall options are available, standard drywall does not match the fire resistance of authentic plaster walls. My customer is opening a small theater on the first floor of their building, while 4 apartments occupy the second floor. Portland cement-based plaster needs to be 7/8-inch to achieve similar results. cnmdm jczj nwwrudk qaz rpb qtmy qkfhqot wg6 zwxt vfl