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FIRST Global Building Guide Created by REV Robotics 2019, Licensed Under CC BY-SA
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3.4.3
Access-Hole Method
The access-hole method is necessary when the ends of the extrusion profile are blocked preventing bolts from entering
the slots. Drill a 6.5mm (1/4”) hole centered on the slot in a convenient location away from the final bracket position
1.
Drill a 6.5mm (5/16”) hole centered on the extrusion slot away from the final bracket location. Drop
the bolt heads into the hole and then slide them into the slot one by one.
2.
Align the bolts so their spacing approximately matches with the bracket hole spacing.
3.
Place the bracket on to the protruding bolts.
4.
Start the nuts on all of the protruding bolts. Slide the bracket to the desired final location and tighten
the nuts.
Figure 26: Access-hole Assembly Method
3.4.4
Drop-In Bolt Method
Drop-in bolts are specialty bolts with a modified head profile which allows them to be inserted into the extrusion channel
without needing to drill an access hole (Figure 27).
1.
Place drop in bolts in the extrusion slot.
2.
Align the bolts so their spacing approximately matches with the bracket hole spacing.
3.
Place the bracket on to the protruding bolts.
4.
Start the nuts on all of the protruding bolts. Slide the bracket to the desired final location and tighten
the nuts.
Figure 27: Drop-in Bolt Assembly Method