Formwork Design Tables - EXAMPLE Flat Slab
JOISTS
- This 19.2 in. becomes the required joist spacing, and joist span has already been fixed at 4-ft.
- What is the required joist size?
- Joist loading = Joist spacing (ft.) x Load on forms
(19.2 ? 12) x 200 =320 lb/lf
- Again using Table 7-5.1 since joists are continuous over several spans, note that a 2x6 loaded at 300 lb/lf has an allowable span of 59 in. and at 400 lb/lf has an allowable span of 51 in.