The original plate separating the first and second floors is post and beam construction using mortise and tenon joinery and wooden pins.     Approximately 40 feet of the plate had to be replaced. The first and second floors were reinforced and then slightly separated. The old plate was removed in sections. The new plate was constructed in place using a laminating technique. Lumber was planed and then glued and screwed together.

The new plate consists of 3 pieces, two outer and an inner piece, notched to create a mortise pocket when the pieces are  assembled. This allowed the new plate to have mortise pockets to receive the stud tennons, long plate sections to be joined as one piece, and post mortise pockets to receive the plate tennons. Thus the replacement plate is installed maintainng the original post and beam construction.