Re: cement floor

Posted by Billy NY on August 10, 2012 at 16:42:58 from (67.248.100.3):

In Reply to: cement floor posted by Ron Grother on August 10, 2012 at 15:43:42:

That has to be designed and calculated, and I may sound harsh, but there is a reason.

A commercial building like you describe with an occupied 2nd floor or I assume based on your description, a building with a reinforced concrete foundation that has a basement under the shop area, needs to be designed as one, foundation supporting walls, columns and beams. Don't forget soil bearing capacity as well. You need a design based on the floor being supported by the foundation walls, beams and columns. You need to determine a rating, say for example 100lbs per square foot, which is typical of an office building, built of similar components, concrete and structural steel.

The owner will be best represented to collaborate with the designer, so as to recognize the loads that will be imposed on that floor, ie; tractors, shop equipment and so on, also include a safety margin and some inclusion to clearly label and warnings placed about such loads so someone does not drive a D8 crawler or some heavy piece of equipment in their thinking its a slab on grade,

I would absolutely make sure the owner has this designed, detailed by a licensed professional engineer, all structural components, stamped and signed with his/her seal and approved by the local building department, before even considering putting a bid or a price on it. A contractor would be extremely foolish and completely liable for negligence if they were to bypass this and arbitrarily construct what they might think is sufficient, it has to be designed, supported by calculations to determine load ratings. Bypass this and there is a strong possibility of catastrophic failure.

For a structural engineer, this is a straight forward job unless there are non typical conditions to deal with.

A typical design would use a concrete foundation, structural steel, and composite metal decking on a steel frame, where concrete is placed you could also look into precast concrete plank and similar precast components that meet the load requirements I suppose, and or using falsework etc. Options can be explored to provide some value engineering for the owner

• Metal Decking

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