DE19728259A1 - Method of producing rectangular wooden beam with central hole - Google Patents

Abstract

The beam (1) consists of four or two single elements (5,3). The sloping parts (4) form the hole (2). The single elements are cut or profiled before or after drying, and the are glued into the shape required in a dry or wet condition. The single elements are produced from the middle parts of a round piece of wood (6). The sloping part is placed near the core of the round log. The middle piece is profiled with a V-shaped slant. The profiled elements for the majority of their cross-section have a year-ring running from one side to the opposite side.

Description

State of the art

The production of wooden beams with a central LOCH is known, in particular in particular through the documents EP 0 388 507 and EP 0 518 246. In these The procedure, however, focuses on the creation of the quarter piece on the outside segment areas of the log, which also makes the characteristic year ring course in the total cross section of the composite beam comes and there are no log core areas in the corners of the beam to draw. These core area-free beam corners (important for crack-free lead practicing bars) assume, however, that the manufacture of the quarter pieces cutting out a round wooden middle section has preceded, and the Er is based on the central log parts - or also Middle and core planks called - for the creation of beams with zen tric LOCH.

description

The production of a wooden beam ( 1 ) with a central HOLE ( 2 ), in which the curvature of the tree ring structure ( 7 ) is directed outwards, which in the diffusion behavior with extreme fluctuations in wood moisture achieves considerable advantages over the known types and enables or use core planks ( 5 ) can be realized by the invention.

The graphic notes show in detail:

Fig. 1 wooden beams ( 1 ) with a central HOLE ( 2 ) and the outwardly arched tree ring structures ( 7 ).

Fig. 2 log cross-sections ( 6 ), from which the center pieces ( 5 ) for a single elements ( 3 ), ( 5 ) are used.

Fig. 3 individual elements ( 3 ), ( 5 ) with bevel ( 4 ) in the core area ( 10 ) and the arched tree ring structure ( 7 ) and their leakage predominantly on side element surfaces ( 8 and 9 ). Furthermore, a center piece ( 5 ) if it is not separated and used as a single element due to the V-shaped bevel profile.

Claims (4)

1. A process for the production of a rectangular wooden beam ( 1 ) with central LOCH ( 2 ), which is composed of four or two individual elements ( 3 ), ( 5 ), the sloping holes ( 4 ) forming the LOCH corresponding to the requirements for Static catalogs are created, and in which the individual elements ( 3 ), ( 5 ) are cut or profiled before or after drying, and / or the gluing to the formation ( 1 ) in the wet or dry state follows, thereby characterized in that the individual elements ( 3 ), ( 5 ) are produced from central parts ( 5 ) of a round timber ( 6 ). 2. Claim according to 1, characterized in that the filed individual elements ( 3 ) in the largest part of the cross-section have a year ring course ( 7 ) from one side surface ( 8 ) to the opposite side surface ( 9 ). 3. Claim according to 1 and 2, characterized in that the slope ( 4 ) in the area to the round wood core ( 10 ) is created. 4. Claim according to 3 to 4, characterized in that the central piece ( 5 ) is V-shaped obliquely profiled ( 11 ).