straight-joint

from The Collaborative International Dictionary of English v.0.48

Straight-joint \Straight"-joint`\, a. (Arch.)
   Having straight joints. Specifically:
   (a) Applied to a floor the boards of which are so laid that
       the joints form a continued line transverse to the length
       of the boards themselves. --Brandle & C.
   (b) In the United States, applied to planking or flooring put
       together without the tongue and groove, the pieces being
       laid edge to edge.
       [1913 Webster]