archiyahoo
Registered User
The title summarizes the predicament. The existing building is a tilt-up concrete exterior, single story construction with appr. 40' x 50' unprotected type II B structure holding the roof by means of 4' deep truss joists with a few shear walls and open web joists running in the other direction. The bearing height of the joists is appr. 31' Its occupancy combines groups B and F-1, with some S-1 storage and an accessory A. It does have more than the required 60' of open space surrounding it on all sides.
We are trying to animate the interior by adding a partial floor (or mezzanine, not clarified yet) and raising a portion of the roof to achieve a clerestory over a portion of the building. The intent is to support the raised part of the roof with heavy timber elements. We'd like to feature the wood, and keep it exposed. We'd like to use CLT for the floor we are adding. To make it even more interesting we are considering removing a part of the exterior paneling and replacing it with curtain wall supported by large glulams.
The question is whether the building should remain type IIB as Type of Construction, using exception 603.1/19, which allows the use of heavy timber for roof construction, or do we have some benefits for classifying the whole building as type IV C. It appears that per section 507.5, we can have an unlimited area building, as it fits the profile the Occupancy Groups.
I appreciate any tips, tricks and Been-There-Done-That's.
Thanks for your time,
RT
We are trying to animate the interior by adding a partial floor (or mezzanine, not clarified yet) and raising a portion of the roof to achieve a clerestory over a portion of the building. The intent is to support the raised part of the roof with heavy timber elements. We'd like to feature the wood, and keep it exposed. We'd like to use CLT for the floor we are adding. To make it even more interesting we are considering removing a part of the exterior paneling and replacing it with curtain wall supported by large glulams.
The question is whether the building should remain type IIB as Type of Construction, using exception 603.1/19, which allows the use of heavy timber for roof construction, or do we have some benefits for classifying the whole building as type IV C. It appears that per section 507.5, we can have an unlimited area building, as it fits the profile the Occupancy Groups.
I appreciate any tips, tricks and Been-There-Done-That's.
Thanks for your time,
RT