Homework Help: Design ultimate bending moment one-way spanning slab

1. Oct 16, 2012

warrio1010

1. The problem statement, all variables and given/known data
Find the design ultimate sagging and hogging bending moments per metre width of slab.

Load on slab- Imposed 32 kN/m
- Permanent 39 kN/m
Length: 5m
Depth: 8m
Thickness: 0.175m

Not sure if relevant but it has 2 spans (i.e. two 5m lengths of slab) but it is a ONE-WAY SPAN.

2. Relevant equations

3. The attempt at a solution
Tried WL/8 but then realised that is just for the moment and not the design ultimate moment.

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

2. Oct 16, 2012

PhanthomJay

The ultimate moment is the design load moment multiplied by code overload factors and strength factors applied for the dead and live load cases. I asume you can use beam tables for a beam on 3 supports to find the max positive moment between supports and the max negative moment at the middle support.

3. Oct 17, 2012

pongo38

The language used in the question is reminiscent of eurocodes. You need to consider the different factors applied to permanent, dead and imposed loads, and then patterned loading in two diffrent load cases to get the moments you need. Do you know what I am talking about? When you say 'depth', do you mean 'width'? How do the loads given in kN/m transform into kN/m2 ?