Light weight truss construction. Has it changed your tactics?
With the abundant use of light weight construction in the building trade these days, how have your departments changed their tactics in regard to vertical venting? Do you still send the truckies to the roof or has the Truss eliminated this tactic from our toolbox. This pertains to flat roofs as well as residential peak roofs. Since vertical ventilation is so critical what are the alternatives other than the use of arial devices?
I-joists are the real problem
I come from a very small career dept. so we don't have a "truck" company and never have. Most of the time we are dealing with a room and contents with 1-2 rooms involved so we are able to hit it and open up the ceiling ASAP. If there is extension it is usually minimal and an indirect attack has always taken care of it. If you have extensive fire overhead, in my opinion, it's pretty obvious before we make entry after doing a quick walk around. Because these types of roofs are built to "breath", taking note of the smoke velocity so to speak can tell you alot. If it's really chugging it's would be advisable to keep people from going onto or under this type of roof system and go to 'plan B' which is using a thermal imager and opening up from below from the safest place possible.
We have one subdivision that was built with I-joist with no protection from below. Good thing is we know about this hazard and will deal with it by just staying out from under these things.