How to do irrigation formwork
For plate 120 H-0.05, the -0.05 here is the elevation of the plate is reduced by 5cm. - drop, + raise. Here the drop and elevation are relative floor elevation.
For your understanding of the 200*350, this is the inside of the beam height. The true beam is 200*500. without the need to deduct plate thickness
Pro, beam section is marked on the drawings, the beam is 200*500.
