Deflection of the slab and to consider the blind pitch, during construction of beam span should be 4 m or less. At a large discount Fulcrum between distance to 3700 mm or less
Deflection of Obiki, allocation pitch, considering the transportation at the time of construction, the span of the joists, it is desirable to be less than 4m. And 3,700mm following a large draw distance between the supports
Repeated bending, layout, construction and transportation, taking into account the beam span, it is desirable to below. In the distance between the fulcrum, sleepers 3, 700 mm or less