To reinforce the existing roof structure by installing new 8" steel channel members between existing roof framing purlins and adding web stiffeners for purpose of supporting the installation of two new HVAC roof top units. No structural member are to be cut or altered and minimal steel roof decking is to be removed to allow penetration of duct work to the bottom of the roof "z" purlins. No additional ducting is to be added as a part of this permit. RTU & duct installation will not be installed in such a way as to block the existing sprinkler system from providing protection per NFPA #13. All per attached structural engineering. NOTE: This building is fully sprinkled and in process of sprinkler upgrade for purpose of using high-pile rack storage. PC#99-491/drs