precast concrete lintels are installed on wall openings such as doors and windows to support the bricks above.

2021 are block brick bricks built calculation cement close concrete concreten connection construction design detail door doors doorway engineer exterior formwork frame holder home house install installation installed lintel lintels load made malaysia masonry may metal modern offset opening openings outdoor pouring precast rebar reinforce reinforced reinforcement roof roofing selangor site size soffits steel structure such support system technology top wall window windows wooden