Rectangular Tube Truss
![Rectangular Tube Truss with Horizontal End Plates](/uploads/default/_1000xAUTO_crop_center-center_75_none/Fig14-copy.gif)
Each vertical member should have two holes 180 degrees apart at each end, in line with the horizontal members. Vertical members' hole placement should be as shown in A and B. Preferably, the size of the holes should be equal, and the two holes' combined area should be at least 30% of the cross-sectional area at either end of the verticals.
Horizontal End Plates
- Completely open is the most desirable.
- If H + W > 24 (61 cm), the area of the hole, plus clips, should equal 25% of the tube area (Area = H x W).
- If H + W is > 16 and < 24 (41-61 cm), the area of the hole, plus clips, should equal 30% of the tube area.
- If H + W is > 8 and < 16 (20-41cm), the area of the hole, plus clips, should equal 40% of the tube area.
- If H + W is < 8 (20 cm), the tube should be left open.