Johnson Level & Tool Mfg. RAS-1 - Manual (Page 18)

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FIG. 9 View of Hip Rafter Layout.
HIP-VAL LENGTH: Use the table on page 47 to obtain the
hip or valley rafter length (continuing the 8 Inch Rise ex-
ample from page 9, Step 3). In our example an 8 Inch Rise
is used, therefore find the column headed “Run Ft.” and
locate 13'. To the right read the column headed “Hip or Val.
Rafter Length” and find a length of 20' 3-7/8" (see Figures
8, 9, 10, 12 and 13).