When designing handrails with the 200 lb. c.l., does the allowable stress need to be divided by 4? Or, can the moment caused by the 200 lb. load be compared to the yield allowable of the material?(Florida, to conform to FBC.) Thanks in advance.
In Florida, for the large missile impact test, a 2x4 (between 7' and 9' long), weighing between 9 lbs. and 9.5 lbs., is shot from a cannon and strikes the surface of a hurricane shutter. The distance from the end of the cannon to the hurricane shutter is 9' plus the length of the 2x4. The...
Wire lath screwed to the ribs of the steel wall, two layers of paper, no other substrate.
Weep screed at the bottom.
Appropriate control joints.
What do you think? Is some additional substrate, such as plywood, necessary?
Thanks.
