| Upward
type blast shaft (patented) open at top permitting snow and rain
to pass down through. During an explosion, the open bottom of shaft
is filled in when bottom hinged relief panel is forced open, causing
blast effects to go straight up out of harm's way |
Open
bottom of left blast shaft allows rain and snow to pass through
and shows closed explosion relief panel. Relief panel on right in
open position fills bottom of shaft, forcing blast effects out open
top of shaft, allowing building to be placed near other facilities.
Shafts are blast rated. |