Calculated-industries 4065 v3.1 Pocket Reference Guide Advanced Consnruc Manuel d'utilisateur télécharger pdf (Page 30)

POCKET REFERENCE GUIDE — 26

Regular Hip/Valley and Jack Rafters

A roof’s Pitch is 255/300 mm and half the

total span is 1800 mm. Find the lengths of

the Common, Hip/Valley and Jack rafters.

Also find the incremental jack adjustment

and the cut angles. (Jack rafters at 400

mm On-center spacing.)

KEYSTROKE DISPLAY

1. Find the Common rafter length:

o o 0.

1 8 0 0 Ç 9 R RUN 1800. MM

2 2 5 Ç 9 p PTCH 225. MM

d (Common) DIAG 2237. MM

2. Find the Hip/Valley rafter length and cut

angles; then the incremental jack adjust-

ment, Jack rafter lengths and cut angles:

H H/V 2872.

H PLMB 27.56°

H LEVL 62.44°

H CHK1 45.00°

j JKOC

STORED

400. MM

j INCR 497. MM

j JK 1 1740. MM

j JK 2 1243. MM

j JK 3 746. MM

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Calculated-industries 4065 v3.1 Pocket Reference Guide Advanced Consnruc Manuel d'utilisateur Page 30