The broken-out lintels of openings are to be replaced by wooden lintels
composed of squared lumber, 2 by 4 inches in size, laid side by side
across nearly the whole thickness of the walls, with not more than 1
inch space between the boards, and of the same length as the original
lintels. The broken-out walls are to be trimmed to afford solid resting
places for the new lintels, which are to occupy the same horizontal
planes that the old ones did. The openings above the lintels are to be
filled in in the same manner as the underpinning previously described,
the tinder wall surfaces being carefully dressed to afford solid
horizontal bearings, the brick work being set back 1 inch from the wall
surfaces and plastered with a coating of cement mortar to bring it out
flush with the wall.