The Dema Ultimate Tunnel Form System (DUS) is an improvement on perfect, allowing concrete to be poured upto 1.5 hours earlier each day! Due to the quick release diagonal adjusting prop the DUS does not need manual adjustment at every usage; additionally the quick set and release system means that the formwork can be struck from the concrete surface with two easy movements, releasing the prop and lowering the jacks. The 3rd cross beam at the top of the vertical panels is vital with any diagonal prop load bearing system as it provides the necessary rigidity to the stress bearing joint of the horizontal and vertical panels ensuring the formwork does not distort and warp over time and therefore creating either a ‘lip’ on the concrete surface or needing repair/replacement. Although there is no such thing as modular tunnel form for tunnel form building as spouted by some manufacturers The DUCS system is the closest imaginable. The system also allows for the easiest and quickest adaptation to new projects with the addition of cost effective vertical and horizontal adapters and table systems for wider room spans. The system also incorporates a special quick release shaft system for elevator and stair shafts incorporated in the buildings designs. Perfect weight strength ratio, flexibility and adaptable features and time saving designed vital system components and accessories makes this truly the ultimate tunnel form system.