Figure 3-1. End(3) Attach upper arch segment (11) toleft and right intermediate segments in asimilar manner.(4) Place ends of transom chord and endsof transom chord struts over the capscrews (8)protruding from the intermediate arch seg-ments. Fasten with the eye nut and chainassemblies (7). The door winch and transomchord assembly mounted on the arch assemblyis shown in figure 3-2.b. Intermediate Arch. To assemble the in-termediate arch, refer to figure 3-3 and pro-ceed as follows:(1) Arrange arch segments on groundin proper order.(2) Join the segments as described ina(2) and (3) above.3-8. Assembly of Framea. Attach 13 short purlin assemblies, bothends of which have inserts (3, fig. 1-4), to thecaptive hex bolts of an assembled end arch.b. Place’ an assembled intermediate arch onthe short purlins. Insert studs of 13 long pur-lins (1, fig. 1-4) through the purlin stud holesin the intermediate arch into the flanges of theshort purlins (fig. 3-4). Hand-tighten all con-nections.c. Raise end arch and intermediate arch toan upright position (A, fig. 3-5).d. Assemble another intermediate arch asdescribed. Raise and connect it to the longpurlins protruding from the erected section.To do this, work from the ground up, inserting3-2
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