2) A small floor 4.8m x 4.2 m is to be supported by one main beam and 150 mm x 48 mm joist spanning between the wall and

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2 A Small Floor 4 8m X 4 2 M Is To Be Supported By One Main Beam And 150 Mm X 48 Mm Joist Spanning Between The Wall And 1 (85.72 KiB) Viewed 58 times

2) A small floor 4.8m x 4.2 m is to be supported by one main beam and 150 mm x 48 mm joist spanning between the wall and the beam, as shown in the figure below. a) Calculate the safe inclusive floor load if the stress in the timber has a maximum value of 7 N/mm². (4 marks) b) Choose a suitable section modulus for the main steel beam if the stress is not to exceed 165 N/mm². Ignore the weights of the joists and the beam. (6 marks) 2.4 m 2.4 m 4.2 m wall 150mm x 48 mm joists at 360 mm c/c 150mm x 48 mm joists at 360 mm c/c Main beam