Weir SPM Flow Line Installation Manual page 15

STEP 3
Continue to bring end "A" back around to form a second loop. Rib
profile should still evenly straddle union assembly as shown.
STEP 4
Draw end "A" even with "B" end as shown. Ensure that the Rib
profile fits snugly around union assembly (or other applicable
connection). This Rib is now ready for Spine installation. See Page
10-13 for correct spine installation.
NOTES:
a) Rib profiles must always STRADDLE each side of wing union
connection. This configuration provides the most purchase to
contain flow line components on either side if the union fails.
END "A"
END "B"
15
END "A"
END "B"