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Re: Concrete vs. Steel[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: seaint(--nospam--at)seaint.org
- Subject: Re: Concrete vs. Steel
- From: Jim Kestner <jkestner(--nospam--at)somervilleinc.com>
- Date: Fri, 22 Oct 1999 10:40:48 -0500
Scott: The decision to choose one material over the other depends on alot of factors (as I am sure it does in other parts of the country and the world). I will try to reiterate some of these factors for you. Some of the factors that affect our chose of materials include: loads (static and dynamic), span, required performance (service life, movement, vibration, abuse,etc.), environment, fire rating, speed of fabrication, delivery and construction, experience of workers in the local area, available materials, manufacturers and contractors, repetition (especially important in formed concrete structures), weather related costs, weight of the structure (this may affect the number of floors or may require a more expensive foundation system), plan shape(curved or linear), wall locations, offsets, load transfers and floor to floor height of the structure, ability to accomodate mechanicals and of course total building cost (not total structural cost). Most buildings in our area are low rise (under 10 stories) and most likely will go with steel. Hospitals with enough form repetition will go poured in place concrete. Multi story hotels (with repetition) will be precast or poured in place. Parking garages (with repetition) will go precast or poured in place concrete. Schools will probably be load bearing masonry, precast plank and bar joist roofs. Some small one or two story commercial and residential buildings will probably be wood frame. Short span bridges will be poured in place slabs with or without precast girders. Longer spans will be steel girders. I actually enjoy designing in all types of materials since the challenges are different for each. Jim Kestner, P.E. Green Bay, Wi.
- Concrete vs. Steel
- From: Scott Maxwell
- Concrete vs. Steel
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