[ Reply | Next | Previous | Up ]
From: Brian
Location: Bflo.
email: wlbblw@aol.com
Remote Name: 152.163.100.14
Date: 05.31.06
Time: 07:43:52 PM
The newer "triangular - tubular steel" built booms are also pressurized with air from the inside and if the pressure drops, they know they have a structural problem in the boom somewhere, the older, "angular steel channel" booms don't have that feature. -B in B