Slabs General

The calculations in this section are presented in the following Sections:

3.2 A simply supported slab showing what might be deemed typical hand calculations.

3.3 A detailed version of the same simply supported slab but designed, and curtailment lengths determined, strictly in accordance with the provisions of BS EN 1992-1-1.

3.4 A continuous ribbed slab designed, and curtailment lengths determined, strictly in accordance with the provisions of BS EN 1992-1-1.

They are intended to be illustrative of the Code and not necessarily best practice.

A general method of designing slabs is shown below.

1. Determine design life.

2. Assess actions on the slab.

3. Assess durability requirements and determine concrete strength.

4. Check cover requirements for appropriate fire resistance period.

5. Calculate minimum cover for durability, fire and bond requirements.

6. Determine which combinations of actions apply.

7. Determine loading arrangements.

8. Analyse structure to obtain critical moments and shear forces.

9. Design flexural reinforcement.

10. Check deflection.

11. Check shear capacity.

12. Other design checks:

Check minimum reinforcement. Check cracking (size or spacing of bars). Check effects of partial fixity. Check secondary reinforcement.

13. Check curtailment.

14. Check anchorage.

15. Check laps.

<BS 8500-1: Tables A4 & A5> <BS EN 1992-1-2: Tables 5.8, 5.9, 5.10 & 5.11> <4.4.1>

<BS EN 1990 & NA Tables NA.A1.1 & NA.A1.2 (B)> <5.1.3(1) & NA> <5.4, 5.5, 5.6>

<9.3.1.1(1), 9.2.1.1 (1)> <7.3, Tables 7.2N & 7.3N> <9.3.1.2(2)> <9.3.1.1(2), 9.3.1.4(1)> <9.3.1.1(4), 9.2.1.3, Fig. 9.2> <9.3.1.2, 8.4.4, 9.3.1.1(4), 9.2.1.5(1), 9.2.1.5(2)> <8.7.3>

Greener Homes for You

Greener Homes for You

Get All The Support And Guidance You Need To Be A Success At Living Green. This Book Is One Of The Most Valuable Resources In The World When It Comes To Great Tips on Buying, Designing and Building an Eco-friendly Home.

Get My Free Ebook


Post a comment