Cruck whose blades reach only as high as the first transverse member. It is only applied to fairly substantial buildings, excluding those with blades terminating in an apparently 'cut-off fashion above the collar (the 'W' apex of Alcock (1981))
A) Base cruck F) Two-tier cruck
f*) Plate i) Upper tiebeam j) Lower tiebeam k) Common rafter m) Joggled halving n) Barefaced dovetail p) Spur