Open web stud with low thermal conductivity and screw receiving grooves

Abstract

An open web low thermal conductivity steel stud, having a web defining a longitudinal axis and a web plane, side edges along each side of the web, main web openings formed through the web defining two lengthwise sides parallel to the web axis, ribs extending diagonally across the web between the main web openings, right angle flanges formed around the main web opening and along the ribs, bent away from the web, and having flange extensions formed along the right angle flanges formed along the two lengthwise sides of the main web opening, bent at further right angles into planes parallel to but spaced from the web plane to define three sided parallel spaced apart reinforcing channels extending lengthwise along the web, rib openings at each end of each rib defining narrow throat portions of the web for reduced heat transmission, at least one stud leg formed along at least one web side edge, at right angles to the web, and, two parallel screw receiving grooves formed in the at least one stud leg, the grooves being spaced apart equally on opposite sides of the centre of the stud leg.

1 . An open web low thermal conductivity steel stud, having a web defining a longitudinal axis and a web plane, side edges along each side of said web, main web openings formed through said web, said openings defining two lengthwise sides parallel to said web axis, ribs extending diagonally across said web between said main web openings, right angle flanges formed around said main web opening and along said ribs, bent away from said web, and comprising;
 flange extensions formed along said right angle flanges formed along said two lengthwise sides of said main web opening, bent at further right angles into planes parallel to but spaced from said web plane to define three sided parallel spaced apart reinforcing channels extending lengthwise along said web;   rib openings at each end of each rib defining narrow throat portions of said web for reduced heat transmission;   at least one stud leg formed along at least one said web side edge, at right angles to said web;   two parallel screw receiving grooves formed in said at least one stud leg, said grooves being spaced apart equally on opposite sides of the centre of said stud leg, and, planar regions on either side of each said groove for receiving wall panel material thereon.   
     
     
         2 . An open web low thermal conductivity steel stud as claimed in  claim 1 , wherein said steel has a gauge of between about 0.88 mm and 1.15 mm, and wherein the thermal transmission values as compared with a standard C-section stud are reduced by between 80% and 94% 
     
     
         3 . An open web low thermal conductivity steel stud as claimed in  claim 1  wherein said stud includes an edge lip formed on said stud leg, said edge lip being formed at an included angle of about 90 degrees. 
     
     
         4 . An open web low thermal conductivity steel stud as claimed in  claim 3  wherein said edge lip is formed with a groove indented therein. 
     
     
         5 . An open web low thermal conductivity steel stud as claimed in  claim 1  wherein said rib openings are circular, and including annular flanges formed from said web around said rib openings. 
     
     
         6 . An open web low thermal conductivity steel stud as claimed in  claim 1  and including depressions formed in said web around said rib openings, said depressions being of generally irregular triangular shape. 
     
     
         7 . An open web low thermal conductivity steel stud as claimed in  claim 1  and including depressions formed in said web adjacent to said rib openings, said depressions being of generally linear shape. 
     
     
         8 . An open web low thermal conductivity steel stud as claimed in  claim 2  wherein said grooves have sides formed whereby to define an included angle of between 75 and 90 degrees. 
     
     
         9 . An open web low thermal conductivity steel stud as claimed in  claim 8  wherein said grooves are spaced apart from one another by a distance of from between 70 mm and 105 mm. 
     
     
         10 . An open web low thermal conductivity steel stud as claimed in  claim 9  and including a scribe line formed along said at least one leg equidistant between said two grooves and defining the median line of said leg. 
     
     
         11 . An open web low thermal conductivity steel stud as claimed in  claim 1  wherein, in a given length of stud, the metal removed from said stud by said main web openings and said root openings, leaves a mass of metal in the locations of said restricted throat portions is between about 16% and 21% of the total mass of metal in said given length of stud. 
     
     
         12 . An open web low thermal conductivity steel stud as claimed in  claim 1  including an embedment edge formed along said web, said embedment edge defining a root portion, and a mid portion, with concrete flow opening in said mid portion, and metal portions punched from said openings being bent outwardly normal to said mid portion, and a continuous lip formed on said mid portion, said lip being bent at right angles to said mid portion. 
     
     
         13 . An open web low thermal conductivity steel stud, having a web defining a longitudinal axis and a web plane, side edges along each side of said web, main web openings formed through said web, said openings defining two lengthwise sides parallel to said web axis, ribs extending diagonally across said web between said main web openings, right angle flanges formed around said main web opening and along said ribs, bent away from said web, and comprising;
 flange extensions formed along said right angle flanges formed along said two lengthwise sides of said main web opening, bent at further right angles into planes parallel to but spaced from said web plane to define three sided parallel spaced apart reinforcing channels extending lengthwise along said web;   rib openings at each end of each rib defining narrow throat portions of said web for reduced heat transmission;   at least one stud leg formed along at least one said web side edge, at right angles to said web;   said ribs and said throat portions, at a predetermined temperature gradient across said stud, transmitting heat at between 5% and 20% of the heat transmitted across a plain C-section stud.   
     
     
         14 . An open web low thermal conductivity steel stud as claimed in  claim 13 , wherein said steel stud is formed of steel of between about 0.88 mm and 1.15 mm.