Two way hollow-core slab

(10) WO 2020/141564 Al

(22) 03.01.2019

(43) 09.07.2020)

(57) Weight is a highly  effective factor in the design of structures with different occupancies, particularly in cases where it increases the gravity and seismic forces acting on the structure. In applications, thickness of the beams and slabs with large spacing must be increased, leading to a corresponding increase in structural weight. Different methods including the hollow-core and the waffle methods have been proposed to reduce ceiling weight in structures. The proposed method in this paper would not only provide a greater ceiling weight reduction than other similar methods, but also eliminate certain limitations associated with the hollow-core method, including the precast production and the one-way action of this design. To this end, permanent forms were designed and placed together inside the concrete to provide end-to-end voids through the midsection of the concrete slab in two mutually perpendicular directions and a greater volume of unworkable concrete would be removed from the slab midsection.

(71) BAHAVAR, Ali [—AR]; Unite 7, No 28, 51 th St, Jahan Ara St, TEHRAN, 1436743353 (IR).

Related articles:

Issue 2016-08

The modified hollow core slabs

(10) WO 2016/086948 Al (22) 03.12.2014 (43) 09.06.2016 (57) A method and a technique for producing precast-cast-in-situ lightweight rigid building assembled from the modified hollow core slab and...

more
Issue 2019-09

Precast floor slab and method for forming a flooring deck and building formed of precast floor slabs

(11) EP 3 517 698 Al (22) 29.01.2019 (43) 31.07.2019 Bulletin 2019/31 (57) The invention relates to a floor slab, which is intended to form a flooring deck. The floor slab (26) in­cludes cast...

more
Issue 2009-08 Petra slab hanger

Trimmer beam for hollow-core slabs

Some of these systems, which were originally developed for the Scandinavian market, are now being offered to customers across Europe. The slab hangers for hollow-core slabs have been produced in...

more
Issue 2019-08 HEINZE COBIAX

Hollow core ceiling system lowers building weight and reduces costs for drilled pile foundations

The new InterCityHotel Hannover Ost, scheduled for completion at the beginning of 2020, will be an eye-catcher at Andreas-Hermes-Platz: a 15-storey high-rise with a pentagonal ground plan. This is...

more
Issue 2020-02 New guideline for structural components made from precast hollow-core slabs according to DIN EN 1168

New verification method for flexible support

The judgment issued by the European Court of Justice on 16 October2014 in Case C-100/13 means that, since November 2016, the DIBt has no longer been in a position to grant national technical...

more