QUESTION 1 A flat roof spanning 4.25 m is to be designed using C24 timber joists at 600 mm centres as shown in Figure Ql

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Question 1 A Flat Roof Spanning 4 25 M Is To Be Designed Using C24 Timber Joists At 600 Mm Centres As Shown In Figure Ql 1 (36.85 KiB) Viewed 36 times

QUESTION 1 A flat roof spanning 4.25 m is to be designed using C24 timber joists at 600 mm centres as shown in Figure Ql. Loads from the proposed roof construction are: Asphalt 20 mm thick : 0.45 kN/m Insulation : 0.10 kN/m Roof decking boards : 0.30 kN/m2 Timber firrings : 0.01 kN/m² Suspended tile ceiling: 0.15 kN/m? The building is at an elevation of 50 m above sea level and the roof is to be designed for a wind load of 0.6 kN/m. The height available from the supports to the underside of the decking is 150 mm, and the ends of the joist may have to be notched to fit this dimension. Assuming that the roof decking provides full lateral restraint to the joist, choose a suitable size for the joist timbers. Tasks required: a Loading analysis marks) Timber properties and parameters for design (5 marks) 10 Bending capacity check (ULS) (5 marks) (Shear capacity check (ULS) marks) ( Bearing capacity check (ULS) marks) (Deflection limit check (SLS) (5 marks) Total: 30 marks wile bearings (5 (5 (5 100 Joista 500 m centres Joint spas 35 Figure Q1