pinning up
Isaac Kremer/ September 9, 2018/ / 0 comments
The operation of securing the solid horizontal bearing of timbers or lintels on walls or piers of masonry by the insertion of thin wedges of stone or layers of slate or metal; the operation of driving in metal wedges or blades to bring the superstructure to bear fairly upon the substructure, or to restore to the perpendicular a wall which is not plumb. (Sturgis, 1900)