Step 3:
1. Attach the upper frame (5) to the vertical frame (1) with four bolts (16), eight big washers (17) and
four lock nuts (18).
2. Attach the top beam (6) to the upper frame (5) with six bolts (14) and six big washers (17).
3. Attach the two top beams (6) to the vertical frame (1) with four bolts (16), eight big washers (17)
and four lock nuts (18).
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