Web, beam and frame system for a building structure

A kit of parts for on site construction of a plurality of beams for inclusion in a frame of a building structure, such as a floor, ceiling or wall, which structure is required to be capable of bearing a maximum load, comprising:

• a plurality of rectangular, tubular, metallic chords;
• a plurality of screws;
• a plurality of webs, each web comprising at least one channel-shaped portion having a central wall and two opposing side walls which terminate at different positions along a longitudinal axis of the channel-shaped portion in order to locate first and second chords such that the first and second chords are disposed at opposing ends of the web in substantially parallel fashion and the longitudinal axis of the channel-shaped portion is orientated at an angle to the first and second chords, and a flat, tag portion at each end of the channel-shaped portion, the flat, tag portion being substantially continuous with the central wall of the channel-shaped portion;
• wherein each beam, when constructed, comprises first and second chords joined together by a specified number of spaced apart webs, and screws which fasten the webs to the first and second chords, the number of webs for each said beam and the number of screws for each web thereof being selected according to a recipe which determines a substantial minimal number of webs and screws required for each beam in order for said building structure to withstand the maximum load at a given length and depth of beam at a given beam spacing;
• each web including first and second plural numbers of screw indicator locations on the opposing flat, tag portions of the web for fastening the first and second chords respectively to the web, the indicators being located to permit up to a first and second numbers of said screws, respectively, to be installed through the web for fastening each of said specified number of webs to the first and second chords;
• and
• wherein each cord presents opposing lengthwise continuous faces for location of each of a given number of spaced apart webs at any lengthwise point along any side of the beam, for receipt of the screws through the web at the indicator locations so as to pierce and pass through the metal of the chord.