Method for laminated timber beam production

FIELD: building units, particularly structural elongated elements designed for load-supporting made of wood.

SUBSTANCE: method involves preparing strips for further gluing operation; applying glue on strip surfaces having grooves; forming strip stacks and pressing thereof. Upper and lower extreme strips have waved profiles extending for half of strip thickness. The waved structure has triangular profile.

EFFECT: increased load-bearing capacity at a given cross-sectional height and reduced beam weight.

1 dwg

 

The invention relates to the field of construction and can be used in the manufacture of laminated wooden beams.

A known method of manufacturing glued laminated wood beams in RF patent No. 2095528 from 10.11.97,, class E 04 3/18 "Laminated wooden beam, including glued together along the height of the package of horizontally stacked boards with gear connections between them, spaced along the length of the beam, except for a region, the size of which is determined by a mathematical relationship.

There is also known a method of manufacturing glued laminated wood beams in RF patent No. 2198091 from 28.05.2001,, CL 27 M 1/02, including the preparation of tapes for bonding, coating water-resistant adhesive layers of elastic adhesive based on resorcinol resins for plastic tapes with grooves, packaging and pressing beams. In the process of pressing beams provide additional drying of the near-surface zone of the beam, and the grooves have the shape of narrow compensatory cuts and are located along the lateral edges and in the middle of the width on the opposite face of the tape.

A disadvantage of the known methods of manufacturing glued laminated wood beams is at a predetermined section height is insufficient load-carrying capacity, at a given load capacity - inflated section height and, as a consequence, the waste of material and excessive FDS is the result of the weight of the beam.

The technical problem to address with the proposed method is to increase the carrying capacity of the beam at a predetermined section height and the decrease of the self-weight of the beam.

The technical result is achieved by a method of manufacturing glued laminated wood beams includes the preparation of tapes for bonding, coating of the adhesive on the plastic strips with grooves, packaging and pressing beams, the upper and lower extreme of the ribbon beam is made half of their thickness wave form triangular profile, which increases the bearing capacity of beams at a predetermined section height, and due to the selection of the wood is reduced own weight of the beam.

Scheme of wooden beams shown in the drawing: 1 - laminated wooden beam, 2 - strip, 3 - flute, 4 - upper and lower extreme of the ribbon beam.

The method is as follows: tape 2 prepare for bonding, put glue on plastic strips with grooves 3, form packs and pressed beam 1; the upper and lower extreme of the ribbon beam 4 perform half of their thickness wave form triangular cross-section sample of the wood.

The use of the proposed method will improve the bearing capacity of the beam at a predetermined section height and the decrease of the self-weight of the beam.

A method of manufacturing glued laminated wood beams, enabling the th training tapes for bonding, glue on plastic strips with grooves, packaging and pressing beams, characterized in that the upper and lower extreme of the ribbon beam carry out on half of the thickness of the wave-shaped triangular profile.



 

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EFFECT: increased resistance of structure to surface cracking.

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FIELD: building, particularly support beams for form used for concreting cast-in-place floors.

SUBSTANCE: post is formed at least of two sheets each having thickness of not less than 0.03 beam height. Sheets are arranged in slots with forming closed longitudinal channel of rectangular cross-section. Slot depth is not less than 1.4 sheet thickness. Sheets are composed of several components butt-joined at an angle of 45o one to another, wherein beam has not more than one butt-join in each cross-section. Beam comprises spacers having cross-sections mating to that of closed longitudinal channel and rigidly secured in symmetry about butt-joint. Spacer length is not less than beam height.

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FIELD: building, particularly composite timbers.

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EFFECT: increased efficiency.

6 cl, 4 dwg

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EFFECT: increased quality and reliability of timber connection along with reduced labor inputs for timber production.

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FIELD: building, particularly joists, girders, trusses or truss-like structures, namely trussing girders used to cover buildings containing aggressive medium, for instance fertilizer storehouses.

SUBSTANCE: girder comprises upper timber belt, timber post and flexible truss bar formed of synthetic belt, for instance of polypropylene or polyamide belt. The truss bar passes over upper belt ends and is connected with upper belt by clamp, formed, for instance, of fiberglass. Truss bar ends extending beyond the clamp have bends for clamps and fixers are inserted in loops created by truss bar ends. The bent truss bar ends may be welded or stitched together. The fiberglass clamp may be secured to upper belt by fiberglass coach screws.

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FIELD: building, particularly joists, girders, trusses or truss-like structures, namely trussing girders used to cover buildings containing aggressive medium, for instance fertilizer storehouses.

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EFFECT: simplified structure and increased corrosion stability.

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SUBSTANCE: reinforcement unit comprises compressed rod, belt and reinforcing side covering plates. The plates are made of angle bars and provided with transversal diaphragms. Side covering plates enclose belt section corners and pass through slots made in compressed rod.

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FIELD: building, particularly elongated timber building structures used as wall members.

SUBSTANCE: profiled balk has facing boards connected to side balk surfaces. The balk is formed by previous compressing facing boards by drying thereof or mechanical action application to the balk.

EFFECT: increased service quality, manufacturability and extended service life.

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FIELD: construction industry.

SUBSTANCE: method involves preparing tape for gluing; applying glue onto tape surface equipped with grooves; forming packets and pressing structure; tightly covering outer part of constructional structure base with film having tensile strength exceeding that of constructional structure base, said film having different thickness along length of span.

EFFECT: increased resistance of structure to surface cracking.

1 dwg

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