slab formwork This system is engineered for maximum strenght, labor productivity and reuse capabilities. ... mm 2. Aluminum Ledger Length: 1800mm, 2400mm, 6, 8 3. Support system : Aluminum Jack + Aluminum Leg + Base Plate with Square Tube + Drop ... , 6 4. LVL(Item#K1616,K1615) Length: 1800mm, 6 5. Support system : Aluminum Jack + Aluminum Leg + Base Plate with Square Tube + Drop ...