... and Science !Al 3a#39;*a#39; MODULE LWC 1| ... The jambs are then fixed as normal door frames, and the head member is connected by the standard aquot; U aquot; strap at 3a#39; 4* centres to the bottom flange of roof or floor beams. Fixed sash frames are then anbsp;...
|Author||:||Great Britain. Dept. of Education and Science|