User guide

X-9
Interchangeability
Rafter Chart
• Consult the rafter chart above in selecting the components needed for the span
you intend to install. Please note that:
• All spans use (2) base columns and (1) apex. The base column is a male piece
at the upper end. The apex is female on both ends.
• The 60ft span uses only a pair of long rafters (15’-11 9/16”) to complete the beam arch.
• The 70ft span uses two pair of shorter rafters (10’-7 11/16”) to complete the beam arch.
• The 80ft span uses a pair of short rafters and a pair of long rafters,
positioned as shown above, to complete the beam arch.
• Male ends of the base column and all
rafters point toward the apex in all spans.
Male ends consist of pre-installed splices protruding from the end of beam section.
We suggest leaving these splices installed during storage of beams.
• NOTE: We have alternate 5’-3” rafters for 40’ spans. The apex and two base columns,
alone, form a 30’ unit.
40’
This pattern-coded diagram shows the common beam sections shared to allow the
reconfiguration of the 80’ wide unit into the 70’, 60’, 50’, and 40’ wide units.
50’
60’
70’
80
’
60’ Rafter (15’-11”)
50’ Rafter (10’-7”)
Apex
Base
Column
Alternate
40’Rafter
(5’-3”)