Brief Description: Attach extrusions to end ribs, check level
1. I was concerned (again) about twist in the stab.
2. I purchased some 3/4 x 3/4 x 1/8 aluminum angle extrusion from the hardware store. I cut two pieces 280-mm long, and drilled a #40 hole 50-mm from each end of each piece.
3. I positioned one piece on the right end rib, just at the bottom tangent to the tooling holes, drilled through the extrusion to the end rib, and clecoed the extrusion to the end rib.
4. Repeated this procedure at the left end.
5. Adjusted the stab so that the left end was just level.
6. Checked level at the right end. Found that there was a slight twist, the rear was ~3-mm low at the end of a 2-ft level. Construction standard #106 allows ≤1° twist in the stab. The twist angle is arctan(3/610) = 0.28°, which is within the tolerance allowed by CS #106.
7. With this evidence that the assembly of the stab met the construction standards, I prepared to attach the FTTs.
