Q1. Do calculations to establish what is the permanent action (dead load), G, you should use for design of the floor joists. Floor joists are spaced at 300 mm centres and consist of 300mm x 50mm sawn timber (NZ pine) sections (note that Appendix A1 of NZS1170.1 has unit densities of different materials). The mezzanine floor area has 25mm pine plywood screwed on top of the floor joists that can be assumed to weigh 16.2kg/m2 (as per Table 4A of the Ecoply brochure available at (https://chhply.co.nz/assets/Uploads/EcoplySpecificationInstallationGuideCurrent.pdf). There is a 10mm plasterboard (fibrous plaster) ceiling screwed to the underside of the floor joists. Insulation and services within the floor structure can be assumed to add 0.1kPa to the floor dead load. Combine all dead load contributions and compute a uniformly distributed line load, wG (in kN/m), representing the dead load acting on the joists.

a) What is the dead load contributed from joist self-weight? [kN/m] [3 d.p]