Could i have some help with the following:
Design, floor joists in a domestic building to span between walls 3.0m apart.
the construction of the floor is
18mm timber boards
15mm overall plasterboard + skim coat
The joists are 50mm wide and at 450mm centres
The permissible stress in the timber is 5.3N/mm(squared) and the elstic modulus of the timber is 8000N/mm(squared)
the deflection must be limited at 0.3% of the span.