Calculating loads on concrete slabs.

[Pulpboy]

My employer would like me to try and calculate out if a new floor mount jib crane would overload the floor. I'm a junior engineer and haven't done more than simple beam calculations. Here's my problem:

I'm assuming / deriving loads from various equipment in the area and simplifying as many calculations as I can. I've simplified it basically down to a section of floor loading a beam. My problem is that when you look at a cross section of the composite beam - structural steel/concrete/reinforcing rods and formwork, I'm not sure how or if I should include the formwork. (Metal Deck - like cladding) in my calculations.

Does anyone know a good book / website that will help.

 

[49merc]

By floor mount jib do you mean a cantilever jib with a top and bottom bearing or a free standing, floor mounted 360 degree jib?

 

[Pulpboy]

floor mount (second floor). Free standing 220 degree rotation.

 

[JTPE]

If I understand, you have a steel frame with metal deck and concrete floor, true? If so, determine if the deck is truely composite with the steel beam, ie studs and adequate reinforceing. The deck may just be puddle welded with a concrete fill.

The key load with jibs is the overturning which is going to put a torque and a bending moment on your second floor frame. Good luck

 

[ishvaaag]

You can find guide on the strength of slabs reinforced by the steel deck in a downdloadable pdef from a course at Monash University

CIV3221 Building technology
Composite Floor Slabs