Patent ID: 7571888

Claim:
A floor and roof formwork system for forming reduced spaces, the system comprising: a grid structure defined by a series of vertical props, a like number of fixed bolsters mounted on the upper part of the props, and a plurality of formwork panels which rest on the bolsters mounted on the props, wherein the bolsters are disposed on a main tube for coupling by insertion on an upper and hollow end of the respective prop, wherein each of the plurality of formwork panels comprises a metallic rectangular frame with stiffening partitions and a planar panel surface determining a formwork skin, wherein each of the bolsters comprises on top a bolster body having a quadrangular shape and a planar and horizontal upper bolster surface ( 8 ), each bolster comprising in the corners of the bolster surface one of a plurality of individual diagonal bolster projections, each bolster projection is inclined downward toward the interior of the bolster surface and comprises a projection edge, each projection edge comprising two slopes disposed centrally and longitudinally along the projection edge, the projection edge for supporting the corresponding formwork panels in a formwork corner, the formwork panels having internal reinforcements, each formwork corner having internally two inwardly convergent inclined formwork corner surfaces which determine a complementary configuration to that of the upper projection surface of the bolster to support the formwork panels on the bolsters resulting in the formwork panels having a tendency to come together preventing formation of joints in a concurrence of the formwork panels when they are mounted on the same bolster.