This Architectural Drawing is of Portal Wall Plate section. The purpose of a wall plate, A timber wall plate is installed at the top of the masonry wall and the roof structure is fixed to it. During construction, the completion of the masonry wall doesn't just mean a change in structure from wall to roof, it also marks a change in trades, from bricklayers to joiners. Plate level is the timber plate which is going to hold the roof structure including the roof joists, hips and roof rafters. For more details and information download the drawing file.