Unfortunately the main drawing is unavailable due to technical difficulties in the planning office. Please use the drawing above which is a detail from north gable end of a planned boat shed and estimate the height and width of the gable end at the southern end.

You are given that:-

• The roof is flat.

• The slope rises by 2.7 meters over the length of the shed.

• 686mm x 254mm RSJ is being used to construct the frame.

You are also requested to give some indication of the accuracy of your estimate as important decisions have to be made before the full plan is likely to be available.

Answers in the comments box below please.
Alternatively you can write to: Send in an answer with an estimate of accuracy