internal framing any sort of door or window or other opening can be accommodated without lintels double headers or cripple studs an enlarged view of the shoe 30 is shown in fig3 holes 36 for screws are provided in the web of shoe 30 whereby the shoe may be attached to lower chord or cross member 26 of truss 10 and to heel member 16 two legs 40 of shoe 30 locate the truss on the wall panel longitudinally two tabs 42 are punched out of the central area of the shoe and project downwards as prongs the gap between these prongs receives the central web of a wall panel connector which is aligned with the joint between panels and which will be described further hereafter this serves to locate the truss laterally so the combined action of the four downward projections legs 40 and prongs 42 from the shoe 30 serves to align the truss precisely and automatically over the centre of the joint between the vertical frame members 18 the punched opening 44 of the prongs 42 takes up most of the width of the web of the shoe 30 leaving intact two relatively narrow strips 46 which reduces the cross sectional area available for heat transfer helping to retain the thermal integrity of the building envelope the wall sections 12 may be easily erected on either a wooden or concrete floor platform 14 simply by abutting one edge of one panel to an edge of another panel thermal breaks which will be described in more detail hereinafter are provided in the thickness of.