Construction Loads 1

[apazmino]

How many PSF does ASCE 37 list as a construction load?

 

[InDepth]

What are you specifically looking for? There are several loads provided, but some of the construction load information you will need to obtain from the contractor (i.e. cut sheets of cranes, pump trucks, etc....). Please clarify.

 

[apazmino]

I am looking for the construction load for the demolition of a concrete slab. I took the dead load of the slab and assumed a LL of 100 psf for the construction load. I wanted to know what the code lists

 

[kslee1000]

You shall look in another direction. What was the original design load of the slab? You should limit the construction load by that, otherwise, further analysis, and/or temporary strengthening would be required. Also, the LL often is controlled by the equipment, which produces high concentrate load in a small area, but could have profund impact.

 

[RWF7437]

If the slab is to be demolished why do you care what the construction load is ?

 

[msquared48]

The normal construction load I have used for personnel and light equipment is 20 psf, which, as mentioned previously mentioned, should be much lighter than what the slab was designed for.

This construction loading would more likely be used in designing the shoring for support when the slab was curing.

Mike McCann
MMC Engineering

 

[InDepth]

apazmino, its really equipment dependent. As kslee1000 mentioned the equipment will typically control. You'll also need to be very careful on specifying demolition sequencing to prevent the demolition crew from demolishing structural supports that they are standing on (A safety issue). In certain zones you may want to shore temporarily. If you are demolishing multiple levels you may have to shore several levels below as well...because the demoed floor material is going to end up on the floor below.

Construction loads are good, but there is also the construction impact load that needs to be accounted for as well.

 

[apazmino]

Thanks all