초록 ▼

A sheet metal bar member for use as a distance-keeping, stiffening and load-supporting structural framing element in heat insulating building parts of the general class comprising two panels held together in spaced relationship by a framing and having the interspace between them at least partially f

A sheet metal bar member for use as a distance-keeping, stiffening and load-supporting structural framing element in heat insulating building parts of the general class comprising two panels held together in spaced relationship by a framing and having the interspace between them at least partially filled with a heat insulating material, said structural bar member having, between a pair of flanges serving as attachments for the panels, a web that is perforated by a great number of staggered slits arranged in at least four laterally spaced longitudinal rows, said bar member featuring slits bordered by stiffening edge portions bent out approximately at right angle from the plane of the web and additional stiffening formations between adjacent slit ends and adjacent slit rows to permit a minimizing of the thickness of the sheet metal used in the web of the bar member and, hence, also a minimizing of the heat conductivity of said web in the direction from flange to flange of the bar member for a given structural strength required.

대표청구항 ▼

A sheet metal bar member for use as a distancekeeping, stiffening and load-supporting structural framing element in heat insulating building parts of the general class comprising two panels held together in spaced relationship by a framing and having the interspace between them at least partially fi

A sheet metal bar member for use as a distancekeeping, stiffening and load-supporting structural framing element in heat insulating building parts of the general class comprising two panels held together in spaced relationship by a framing and having the interspace between them at least partially filled with a heat insulating material, said bar member comprising a pair of flange portions paralleling and serving as attachments for said panels and an integral web between said flange portions, the plane of said web being substantially at right angles to the planes of the panels, said web portion being perforated by open slits extending in the longitudinal direction of said bar member, said slits being arranged in at least four laterally spaced longitudinal rows, the distance between adjacent ends of said slits in each said slit row being at most one half of the slit length, and said slits in adjacent rows being staggered and overlapping each other with a part of their length corresponding to at least the distance between the most adjacent edges of the slits in the two slit rows in question, wherein each of said slits is bordered at least along both its longitudinal sides by edge portions bent out approximately at right angle from the plane of the web portion and projecting to a height over the surrounding web surface corresponding to several times the sheet metal thickness, wherein first elongate through-like embossments are pressed out of the plane of the web portion to extend transversely between adjacent slit ends in each slit row, said first embossments being doubled between the slit ends in at least some of the slit rows and each having a sufficient length in the direction of width of the web portion to extend almost up to the adjacent slit row on either side of the slit row in question, and wherein second elongate trough-like embossments are pressed out of the plane of the web portion to extend at a slightly oblique angle to the longitudinal direction of the bar member between at least two of the slit rows of the web portion, whereby said web portion is stiffened with reduced thickness of the sheet metal needed for forming the bar member and heat transfer across said web between said flange is reduced.