Compound beam
AssigneeValtion Teknillinen Tutkimuskeskus
InventorsPekka Luotonen, Yrjo Tolonen
Life of this patent
Estimating the term…
Abstract
A compound beam, column or rod, consisting of a web (31) of timber or a wood-based board material or plastic material and of one or several flanges formed of sheet metal and affixed to the margin and bent around the web. The flange (32) has been affixed to the web by teeth or equivalent extending substantially through the web, and possibly using glue as aid. The teeth (33,34) bend when striking against the opposite flange metal sheet, producing a permanent joint. The teeth may also be affixed to the opposite flange by welding. A stress may be produced in the flange before it is joined to the web.
Claims6
A compound beam comprising an elongated non-metallic web member having oppositely disposed side surfaces and an end surface, a substantially U-shaped metallic flange member having leg portions abutting against a part of said oppositely disposed side surfaces of said web member and an end portion connecting said leg portions abutting against said end surface of said web member, each of said leg portions having a tooth portion formed as an integral part thereof extending transversely of said leg portions and penetrating through a substantial portion of the thickness of said web member toward the oppositely disposed leg portion to fixedly attach said flange member and said web member, each tooth portion having a length dimension greater than the distance between the opposite side surfaces of said web member and each of said tooth portions having a tip clinched back toward the respective leg portion to which it is attached.
Dependencies are inferred from the claim text.