Two parallel MC12 x 10.6 channel stringers frame the assembly, spanned by either a C8 x 18.75 or C10 x 12.3 channel in Section A and an additional C4 x 5.4 channel in Section B. The intermediate channels are anchored using three-quarter-inch diameter anchor bolts spaced at twelve inches on center with three-inch end clearances. Fillet welds of quarter-inch and three-sixteenth-inch typical sizes secure the channel connections.
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