Created by Michael Martin May 04 / Reviewed & updated April 2010

Drawing Exercise – Hip End Gives a good understanding of the different triangles found in a hipped roof Which we use to create the different bevels

Lets have a look, one by one at these shapes in the roof Ref: P38 text 1) Plumb bevel common rafter 2) level bevel common rafter

3) Edge bevel for the creeper Ref: P39 text

4) Edge Bevel Purlin Ref: P 40 text

5,6,7) Plumb, level and edge bevel for the hip Ref: P 41 text

8) Face bevel purlin Can be looked at two ways Ref: P 42 text

One way to develop these bevels is on a steel square Follow these on from page 43 in your text These are a matter of remembering (a) what creates them (b) calculations Remember for these the three constants Rise The Run from rise per m. run, so 1.0m The Plan length of hip per m. run of common rafter, so 1.414

Plumb and level bevel common rafter P 43

Edge bevels for creeper and purlin Ref: P44

Plumb and level bevel for the hip Ref: P 44

Edge bevel hip Ref: P45

Face bevel purlin Ref: P 45

All bevels on one page Same as example from last week Ref: P 46

There is reference in your text on page 47 This is a practical project For this method it is easier to show you on a drop saw A lot of people use this method

This method also requires you to remember the three constants, rise, run, plan length hip It is a very simple method More people are adopting it to use Well draw one on paper now, then again on plywood in workshop

You must be able to develop these bevels to pitch any roof we do from now on What method you choose is up to you Some of you will choose different to others, it doesnt matter

What weve done so far Identify and cut our new members, centering rafters, hips, crown end and creepers Set out our pattern rafter, which we use to calculate the length of our creepers Calculate the length of our hips or measure them in situ Develop our eight bevels for the roof

Also known as underpurlins Parallel to ridge & plates Normally spaced at 2100mm centres Placed in a continuous line around the four sides of the roof Joined at corners, under the hips Joins are a compound cut made up of face and edge bevel purlin

Look at page 29, 30 in your text book to gain an understanding of the position of the purlin in a hipped roof Strutting is still via inclined struts, or fan struts or alternative cable struts, as for gable