For this exercise we will base the calculations on a roof similar to that used by UK apprentices in their Site Carpentry Level 3, Synoptic Practical Assignment, Construct a traditional hipped roof and dormer.

For those familiar with the test, to recap;

Task A: Determine lengths and bevels (time guide 4 hours)

• Determine the lengths and angles of all your timbers.

• Write them on your equipment list.

The dimensions in this exercise have been changed from those in the synoptic test. This will enable students to practice these techniques and independent learners the opportunity of confirming their findings in Task A.

Alterations to the specification

Preparation for the assignment

The learner is to set out for a hipped roof as follows:

• roof pitch is to be 40.05° (40º 03’ 00”)

• span across the wall plates 2860 mm

• length of the roof 2750 mm

• hips to be put in at 45° to ensure equal pitch

• rafters are to be centred at 330 mm

A fascia board and soffit will then need to be fitted with an eaves projection of 220 mm.