E - Fixed Constructions – 04 – C
Patent
E - Fixed Constructions
04
C
72/47, 72/87
E04C 2/06 (2006.01)
Patent
CA 2016624
ABSTRACT As presently designed, reinforced load bearing concrete panels 12, which are intended to be supported between at least two separated supports 14, are over-designed by the inclusion of more flexural reinforcing material then is required to provide adequate structural strength. It has been determined that panel 12 deterioration and top surface 16 cracking are increased by flexural reinforcing materials 34 and 38 which are located within the top half of the concrete panel 12 in accordance with current practice. This is due to the fact that flexural reinforcing materials which are in the top half of the panel are subject to corrosion, thereby accelerating degradation, of the panel and increasing the severity of cracks in the top surface. Therefore, it is now taught that flexural reinforcing material in the top half of existing panels can be entirely removed, and that flexural reinforcing material 20 may be confined to the lower half of the panel, without reducing the strength of the panel below what is required to provide adequate structural strength, and that such panels will in fact exhibit improved durability and reduced top surface cracking. Various practices to control development of cracking at the top surface due to temperature change and concrete shrinking are employed at the upper half of the panel, other than the use of standard flexural reinforcing material. The removal of flexural reinforcing material from the top half of the panel results in fewer production steps and in reductions in the cost of construction materials.
Allen John H.
Fetherstonhaugh & Co.
LandOfFree
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