SE461109B - BJAELKLAG FOR PARKING HOUSE - Google Patents

Description

461 109 10 15 20 25 30 35 40 the sheet metal deck was used as a lost form for a cast-in-place concrete slab 44. At the lower edge of the concrete slab 44, the trapezoidal profiled sheet forms beams which, due to the upper flanges 42 of the secondary beams 16-20, are at a much lower level than the upper flanges 23 of the primary beams will to a substantial extent be located below the upper flanges 23 of the primary beams. These concrete beams have all been given the same designation 47. The concrete slab 44 is crack reinforced with a reinforcing mesh 46. longitudinal reinforcement bars 48- The reinforcement in the concrete slab 44 and its beams 47 is extremely simple and fast, so that the construction time becomes short. The upper flanges of the primary beams 12 are arcuate in a central portion located between the secondary beams as shown in Fig. 1.

The arcuate shape is essentially that which the plates 35,36,37 would have due to their own weight if they were to be laid balancing only on a central support. Outside the secondary beams 17 and 19, the upper flanges 23 are straight but inclined. The connection between the arcuate part and the two straight parts is suitably asymptotic. The attachment of the secondary beams 16-20 connects to the arcuate shape of the upper beams of the primary beams. This arcuate shape facilitates the laying of the sheet metal and provides a suitable slope for a parking deck. In addition, a thickening of the concrete towards the center is obtained if the upper surface of the concrete is laid straight against a ridge over the middle of the primary beams, as shown, which is advantageous for parking garages, since the carriageways are conveniently located there. Between the ends of the primary beams 12,13 perpendicular to the primary beams run the drainage gutters 22 connected to downpipes adjacent to the primary beams support pillars 15. The drainage gutters drain both the upper surface of the concrete, but also the mold plate if water were to form between the mold plate and the concrete. The plate thus constitutes an extra sealing layer.

Fig. 3 shows an alternative embodiment in which the trapezoidal corrugated sheet has an upper flange 50 which is so wide that it completely covers the upper flanges 23 of the primary beams. at least to the level of the upper flange 50 or slightly higher as shown in the figure. Each plate thus consists of a half-narrow lower flange 53,54 on each side of a wide upper flange 50. The rising joints form tensile reinforcement for the concrete. A lower flange 53 on a plate and a lower flange S4 on an adjacent plate thus together form a complete lower flange. However, a crack reinforcement in the form of a net 46 as shown in Fig. 2 should suitably be used.

The plate in the rising joints can be provided with small bumps to provide interaction with the concrete. This design of the platform entails an even shorter construction time.

Claims (2)

H PATENT CLAIM 461 109 Parking garage floors comprising primary beams (12), secondary beams (16-20) supported by the primary beams and a concrete slab (44) supported by the secondary beams, the secondary beams being located between the upper and lower flanges of the primary beams (23,24), characterized in that the upper flanges (23) of the primary beams are arcuate at least in a central portion and that a lost form 1 plate (35,36,37,4l) rests on the secondary beams and connects to the arcuate shape of the upper flange (23) of the primary beam, and the upper surface of the concrete slab (44) is substantially straight with a slope in both directions from the center of the primary beams so that the thickness of the concrete slab gradually increases towards its axis formed along the center of the primary beam. Floor according to claim 1, characterized in that said central portion is arcuate in shape to have substantially the same shape as the form plate would have due to the dead weight if it were to be laid balancing only on a central support. f y / H