SU1698395A1 - Glued bearing timber and its manufacture procedure - Google Patents

Abstract

The invention relates to construction and is intended for the manufacture of supporting structures for buildings and structures. The aim of the invention is to reduce the consumption of materials while maintaining the carrying capacity and simplify the manufacturing process. The glued wooden bearing element includes parts connected in a skate that have a variable cross-section along the length with a thickening at the supports, each of which is made in the form of a package of boards with glue layers between them. Each part of the element is made with an additional thickening in the ridge, and the length of each thickening is equal to 1/7 to 1/17 of the element length, and the height of the package cross section at the supports to the height of the cross section in the span is determined from the ratio 1 1.0 N / n 2.2, where H is the height of the package cross section at the supports; h is the height of the package section in the span. A method of manufacturing a glued wooden carrier element includes a set of a package of boards, applying glue and pressing the package, glue at the supports is applied along the entire height of the section of the package, in the passage - into parts of the height, and after pressing they cut out the non-glued part to the given heights and lengths. 2 sp, f-ly, 3 ill. w Ј

Description

The invention relates to construction and is intended for the manufacture of supporting structures for coatings of buildings and structures,

The aim of the invention is to reduce the consumption of materials while maintaining the carrying capacity and simplify the manufacturing process.

Fig. 1 shows a three-hinged arch of rectilinear glued wooden elements with tightening; 2 a three-hinged arch of bent glued

wood elements; fig. 3 shows a fragment of a package of boards in the manufacture of a glued wooden element.

The glued timber bearing element 1, for example, the arches includes interconnected parts, joined in a ridge with a slip 2 and having a metal hitch 3 with supporting shoes 4 that perceive thrust, the thrust bearing can also be perceived directly by the foundations 5. The glued timber element 1 consists of a package boards 6 collected by

ON O 00 S O O

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the height of the section of the element H, on the base of the equipment 7, between which adhesive layers 8 are placed. The glue wooden element 1 is made along the length of a variable section with thickening at the supports and in the ridge. The length of each bulge is from 1/7 to 1/17 of the length of the element, and the height of the cross section of the package at the supports to the height of the cross section in the span determines from

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ratios - g - 2,2 where H - height h

package sections at the supports; h is the height of the package section in the span.

The implementation of the glued wooden carrier element 1 is carried out as follows.

A set of boards 6 is assembled and coated with glue: to a height within the limit of 1.0 H / h 2.2 along the entire length of the plate, and supporting parts within the range of 1 / 7-1 / 17 - to the entire height . Then the board pack is pressed, and after removing the pressurized pressure 9, the boards are cut out, the seams 10 which are not smeared with glue along the cutting line 11 are cut.

A change in the reduced range of the ratio of the length of the supporting part of the glued wood element to its length L to a greater or lesser side leads to

i reduce the effect of reducing the material capacity or loss of bearing capacity.

The ratio of the height of the supporting part of the cross-section of the river section H glued., Wood element 1 to the height of the cross section in

 span h should be in the range of 1.0 H / h 2.2, depending on the ratio of the constant and temporary loads on the structure. An increase in this ratio of more than 2.2 leads to a loss of the bearing capacity of the structure from the action of a one-sided load.

Calculations on strength and deformability show that while retaining the carrying capacity, the consumption of materials of the glued wooden bearing element, for example, for the upper part of the three-hinged metal-cutting arches with a 18m span

for a load of 900 kgs. p.m., having the length of the supporting part 1/9 of the length of the glued wooden element and the ratio of the height of the cross-section of the supporting part H / h 1.85. reduced by 21% compared with the known

by decision.

Claims (2)

Claim 1. Glued wooden bearing element comprising interconnected parts in the ridge, having a variable cross-section along the length with a thickening at the supports, each of which is made in the form of a package of boards with adhesive layers between them, characterized by. what with In order to reduce the consumption of materials while maintaining the bearing capacity, each part is made with an additional thickening in the ridge, and the length of each thickening is from 1/7 to 1/17 of the element length, the height of the package cross section at the supports to the height of the cross section in the span is determined from the ratio 10- H / h 22 where H is the height of the cross section of the package at the supports h the height of the cross section of the package in the span 2. A method of manufacturing a glued wooden carrier element comprising a set of a pack of boards, applying glue and pressing a pack, characterized in that. in order to simplify the manufacturing process, glue at the supports is applied along the entire height of the package section, and in the passage, parts of the height, after pressing, cut out the non-glued part to the specified height and length 2 iff w% w w t sh w HI-t m w tp /// /// /// No..Ј I I I I I I I I I I I II I II P Yu V l L / 7 g / eight