| 摘要 |
<p>The template comprises a substantially L-shaped element 9 adapted to fit over a part of a building. A first arm 11 is pivotably mounted at one end at a first point 12 on the L-shaped element. The first arm is also provided with means for pivotably mounting the first arm at a second point 15 spaced from the first point. A second arm 13 is pivotably mounted at one end at a third point 14 on the L-shaped element , spaced from the first point. The second arm is also provided with means for pivotably mounting the second arm at a fourth point spaced from the third point. The template may also include a second L shaped part and further pivotably mounted arms. The arms may be connected to an extendable elongate bar 7. The first arm may include a mounting point which is adjustable by having a number of through holes or releasably movable along an elongate slot. The template may include a further component comprising two arms which are pivotally interconnected at one end. The template allows formation of a rafter while taking into account a birds mouth cut.</p> |
