ACTIVE STATION ASD48-1A Assembly Instructions Manual page 5

Lay 2 Long (C) and 2 Horizontal (D) tubes
on a flat surface as shown. Line screw
holes up and bolt tight using M8X10
locking bolts (6 per leg)
2: Connect horizontal frame pieces to legs
3: Install 2 feet pieces (B)
Bolt 2 leg pieces (B) to legs
using M8X25 bolts (4 per leg)