Thesis Abstract

Executive Summary

Structural Steel Frame: All structural steel frames shall be securely braced until all floor slabs, roof decks and shear walls have been installed and become capable of stabilizing the frames. Bracing used is steel angle welded to columns and floor beams. Composite metal decking shall be used for all elevated floor slabs. A tower crane will be utilized for all steel erection. Crane will be located between the two elevated walkways directly adjacent to the elevator shaft. Crane swing is above helicopter pad for the hospital and will have to be shut down and boom swung out of the way whenever use of the pad is required. Coordination for this is done through radio contact with the hospital and Lancaster County Communications.
Cast in Place Concrete: Cast-in-place concrete will be placed on composite metal decking in the cardiac elevator project. No formwork is required due to the metal decking. Edge stops will be permanently placed continuous bent plates 3/8”x4”x5-1/2” welded to the top of the steel floor beam with a ¼ 3@12 fillet weld. Concrete slab on deck will be 4” in depth light weight 4000psi (110 PCF Maximum). Other concrete to be used for foundation will be placed in footing excavation requiring no other formwork. This concrete shall be 3000psi normal weight concrete.
            Mechanical System: Mechanical rooms are located on the 4th and 5th floor of the hospital directly outside the shell space on the 5th floor with the 4th floor mechanical room located directly underneath. Air handling units are forced air systems with distribution through ductwork utilizing smoke and fire dampers wherever a fire or smoke rated wall is penetrated. All areas of the hospital are fully sprinkled and the sprinkler system in the shell space are existing however drops will have to be added and main lines relocated to match floor plan layout. Sprinklers for the new elevator lobbies will be run by tapping into the main branch lines running down the corridor being tied into.
            Electrical System: Electrical service comes from 4-480V 75KVA transformers serving 8-120/208V panel’s normal branch. 3-480V 75KVA transformers serving 6-120/208V panel’s critical branch and 2-480V 15KVA transformers serving 2-120/208V panel’s life safety branch. Also the floors are supplied with nurse call systems, alarm systems and emergency lock down systems.
            Masonry: Masonry system will be a brick veneer located on the 3 exposed sides of the elevator shaft. Adjustable masonry ties to be attached to 6” metal stud wall. Construction scaffolding will be used adding sections as required.