Structures for Deflagration Venting
Structures for Deflagration Venting
(OP)
Does anyone have experience designing structures for deflagration venting that could point me to structural design resources?
Im looking into structure type, and to whether or not a steel ceiling structure with metal roof deck and cmu walls is appropriate or if i need to choose a CIP concrete structure for a 40ftx40ft room.
to complicate the problem, i have an existing hss column that will stand in the middle of the room we are enclosing and i need to know how to protect it.
your help is appreciated. thanks!
Im looking into structure type, and to whether or not a steel ceiling structure with metal roof deck and cmu walls is appropriate or if i need to choose a CIP concrete structure for a 40ftx40ft room.
to complicate the problem, i have an existing hss column that will stand in the middle of the room we are enclosing and i need to know how to protect it.
your help is appreciated. thanks!






RE: Structures for Deflagration Venting
-Blast panels / blow out panels to limit forces within the room. Panels are tied back to the building so they wont fly across the site.
-Masonry or Precast walls. I can't put my finger on the source right now (NFPA? FM Global?) But I believe 12" masonry grouted solid the standard.
-Design for an equivalent static load, typically 100 psf on my projects.
-I wouldn't worry about a post in the center of the room - there's very little surface area for a blast to act against, compared to the walls.
-I haven't used any special details for the roofs.
Typically your walls will need several girts at a relative close spacing. Pay attention to weak axis bending for the posts that support these girts.
RE: Structures for Deflagration Venting
RE: Structures for Deflagration Venting
RE: Structures for Deflagration Venting
can i assume that my foundation will need to be designed for the uplift on the structural ceiling, resulting from the blast? or is their an exception?
RE: Structures for Deflagration Venting
b) I typically don't design the roof for the blast load, so there's no way to get the load into the columns or foundations - no uplift.
RE: Structures for Deflagration Venting
any upward force on the ceiling will get back to by supports and into the ground. i just wondered if there was some exception or reduction in the foundation design.
thanks for your responses.
RE: Structures for Deflagration Venting