The object of the invention is an 1-profile preform which comprises an outer wall (1) of the first flange and two inner walls (2) of the first flange arranged with respect to the outer wall (1) of the first flange, a first web wall (3) and a second web wall (4) being arranged in a plane parallel with respect to the first web wall (3), an outer wall (5) of the second flange, and two inner walls (6) of the second flange arranged with respect to the outer wall (5) of the second flange, wherein the corresponding walls (1, 2, 3, 4, 5, 6) are arranged with respect to each other while retaining a gap forming a closed empty inner space of an 1-profile preform, and wherein a valve element (7) is arranged on at least one wall (1, 2, 3, 4, 5, 6). The object of the invention is also an 1-profile manufacturing method with the use of an 1-profile preform.

A formwork support for supporting concrete formworks in the construction sector, comprising an upper flange and a lower flange, which are connected to one another via a hollow profile web such that they are at an invariant distance in relation to one another, wherein the hollow profile web is stiffened inside by framework struts.

A beam for formwork systems, with a transverse cross-section that is symmetrical with respect to an axis of symmetry and having, in succession:

a first portion with two C-shaped profiles, which are arranged mirror-symmetrically with respect to the axis of symmetry, with mutually opposite cores and cavities directed outward, connected by a plate for connection between two mirror-symmetrical wings thereof,

a connecting element, which extends along the direction of the axis of symmetry, between the plate for connection and a base,

a second portion with two protrusions which extend from the base and are provided with transverse end elements.

A decking support system including a plurality of decking support elements, each decking support element including a first decking support engagement feature and a second decking support engagement feature, a plurality of connection elements, each connection element including a first connection feature adapted to co-operate with said first decking support engagement feature of a decking support element, and a second connection feature adapted to co-operate with said second decking support engagement feature of a decking support element, the arrangement being such that a first of said plurality of decking support elements is engageable with a second of said plurality of decking support elements by means of one of said plurality of connection elements dependent on said respective co-operations.

This publication relates to a tubular transom in particular for temporary structures, such as scaffolding or false work and similar structure, having ends configured to be connected to verticals at node sections arranged at intervals on the verticals. Each end of the transom comprises a fastening device with an integrated profile part, releasably attached to the tubular transom in an opening at the ends of the tubular transom. The transom comprises a first and at least second elongate, parallel and hollow tube elements, interconnected at least at each end by intermediate integrated web plates, rigidly fixed to said at least two tube elements. A contact surface of the opening in the first tube, is transversally arranged relative to one or more web plates. A contact surface of the opening in the second tube is transversally arranged relative to one or more web plates. The opening at the ends of the transom having at least partly a complimentary shape.

The present disclosure relates to a notched steel beam and a floor slab structure of a flange embedded floor slab and a construction method. The notched steel beam comprises a web (1), wherein an upper flange (2) and a lower flange (3) are respectively arranged on the upper end and the lower end of the web (1); the flange embedded floor slab comprises four rectangularly distributed floor slab stand columns (7), a steel beam (8) is arranged between the adjacent floor slab stand columns (7), laminated slab bottom slabs (9) are arranged between the two steel beams (8) which are symmetrically distributed, floor slab reinforcing steel bars (10) are arranged above the laminated slab bottom slabs (9), a concrete layer (11) is arranged on the floor slab reinforcing steel bars (10); and the steel beam (8) is the notched steel beam of the flange embedded floor slab.

A hollow groove pipe structure is disclosed and includes a hollow groove pipe, first fixing sliding members, second fixing sliding members, and fixing members. The hollow groove pipe has a first surface, a second surface, a third surface, and a fourth surface for surrounding a hollow space. At least two opposite surfaces have grooves, and the bottoms of the grooves are greater (wider) than the opening and provided with trough holes. The plates having a plurality of protruding portions can be clamped in the grooves. The first and second fixing sliding members having protruding portions surround and clamp the plates with the space between the two through holes of the grooves, such that the fixing members pass through the holes of the first fixing sliding member, and the holes of the groove the holes of the second fixing sliding member fix and combine the plates into a whole.

A truck assembly is configured to travel along a track having rails, and includes a first side frame, a second side frame, and a bolster extending between the first side frame and the second side frame. One or more of the first side frame, the second frame, or the bolster includes at least a portion formed as an I-beam that includes a web having a first end and a second end opposite from the first end, a first flange extending from the first end of the web, and a second flange extending from the second end of the web. A thickness of the web increases away from a first neutral axis towards the first flange and the second flange.

A modular partition system comprises a plurality of panels and at least one connecting strip. Each of the plurality of panels comprises two support members extending generally perpendicularly to a plane of the modular partition system and a central panel extending between said two support panels. The plurality of panels are arranged such that the central panels of each of the plurality of panels are generally mutually parallel and one support member of each of the plurality of panels is adjacent to a support member of an adjacent panel. The at least one connecting strip cooperates with a support member from each of two of the plurality of adjacent panels so as to connect said two of the plurality of adjacent panels.

A joist is disclosed. The joist includes a first leg portion, a second leg portion, and a central portion, wherein each of the first leg portion and the second leg portion define a first side, a second side, and a distal side, and one or more stiffeners defined within each of the first side, the second side, and the distal side of the first leg portion and the second leg portion.