Static structures (e.g. – buildings) – Machine or implement
Patent
1985-01-30
1987-03-31
Bell, J. Karl
Static structures (e.g., buildings)
Machine or implement
52696, 52DIG6, 403217, F16B 1500
Patent
active
046532420
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention relates to improvements in the manufacture of wooden beams and relates particularly to improved methods and apparatus for manufacturing wooden beams with butt-joined or spliced timber lengths.
In many applications in the building industry it is necessary to provide lengths of timber of substantial width and length in relation to thickness, such as for use as structural beams, floor joists, lintel beams, roof beams, rafters and the like.
With present day timber shortages and environmental control regulations, it is becoming increasingly difficult to obtain desired solid timber in wide sections and long lengths, and in particular in defect-free quality.
In the past it has been known to provide spliced beams by edge gluing two or more separate lengths of timber. It has also been known to butt-join timber lengths using known nail plates on either side of the lengths of timber to be joined and/or by machining interlocking formations, such as dovetail formations, in the ends of the timber lengths to be butt-jointed. Experience has shown that spliced beams and butt-joined beams formed by these known methods are unsatisfactory and uneconomic and such beams are generally usable only for substantially load-free applications.
BACKGROUND ART
U.S. Pat. Nos. 2,877,520, 3,011,226 and 3,016,586 and Australian Pat. No. 291,878 all disclose forms of structural wooden joints formed of timber members connected solely by metal plates having nail-like projections or teeth struck out from the plane of the plate and embedded in the timber members. Such plates are very effective in the manufacture of trusses and similar timber structures having several timber members extending in different directions and being interconnected with each other by the disclosed nail plates, which are limited to flat connectors.
U.S. Pat. No. 3,305,252 discloses another form of nail plate useful as a corner connector to be applied to two or three surfaces of a structure which intersect at an angle with respect to one another.
U.S. Pat. No. 3,365,222 discloses a wall brace having a U-shaped joist receiving member and a gussetted projection which is secured to a wall or the like. The joist receiving member has a number of inwardly extending teeth or fastening means which are driven or hammered into a joist to secure the joist relative to the wall or the like.
U.S. Pat. No. 3,427,055 discloses another form of plate connector for a corner joint having teeth of varying height to facilitate engagement of the teeth within the timber members forming the corner joint without distortion of the plate connector.
U.S. Pat. No. 4,318,628 discloses a device for assembling and connecting two or more construction elements, the device being formed with seats to receive the elements in the desired relationship, and one or more locking projections intended to penetrate into the elements. The projections extend from a bottom wall of each seat to engage and penetrate an end surface of the respective elements.
British Pat. No. 1579794 relates to a modified form of nail plate fastener particularly useful for joining angularly related timber members. The fastener comprises a bent plate having teeth struck from each portion, at least some of the teeth having an angularly extending shank portion and a tip portion which projects from the shank towards the plate portion. This type of projection enables the fastener to be located in position before the tip portions of each tooth are driven into the timber members being connected, the shank portion then lying in the plane of the respective plate portion. Teeth of this type are commonly referred to as "knuckle nails".
While the prior art forms of fasteners may be used for joining timber members to form corners, trusses and the like, it has been found that such fasteners are ineffective for butt-joining timber lengths to produce structurally sound beams as the strength of such beams is restricted by the holding power of the projections or teeth embedded in the timber sections.
It is there
REFERENCES:
patent: 1373036 (1921-03-01), Upson
patent: 3309833 (1967-03-01), Jureit
patent: 3708942 (1973-01-01), Leonard
patent: 4241557 (1980-12-01), Jensen
patent: 4334346 (1982-06-01), Jensen
patent: 4501102 (1985-02-01), Knowles
Bell J. Karl
Ezijoin Pty. Ltd.
LandOfFree
Manufacture of wooden beams does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Manufacture of wooden beams, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Manufacture of wooden beams will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2204134