A wooden floor is required to carry a load of 12 kN/m² and is to be supported by wooden joists of 120 mm x 250 mm in section over a span of 4 m. If the bending stress in these wooden joists is not to exceed 8 MPa, what is the spacing of the joists? 1. 356 mm 2. 318 mm 432 mm

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Pressure and Stress