在预留施工洞口两侧时，应当砌筑成马牙槎并安放水平拉结筋，上口处设置过粱

When preserving both sides of the construction hole, the masonry shall be built into a horse-jacket and horizontal tie bars shall be placed, and beams shall be installed at the upper mouth, and the height shall not be greater than 1.4m. When building the door and window opening, if the door and window frame is erected first, the bricklaying should be about 3mm away from the side of the door and window frame. If the door and window frame is plugged in, the masonry should be built according to the position of the ink line (generally the line width is 10-20mm larger than the actual size of the door and window).

In the reserved construction hole on both sides, should be built into a horse's teeth and placed horizontal pull ribs, the upper mouth is set, the height should not be greater than 1.4m. In the masonry door and window hole, if the first door and window frame, then the brick should leave the door and window frame edge about 3mm. If the rear plug door window frame, should be built according to the bulleted ink line position (general line width than the actual size of the door and window 10-20mm larger).

When reserving both sides of the construction opening, it should be built into a horse toothed tenon and placed with horizontal tie bars, and a lintel should be set at the upper opening, and the height should not be greater than 1.4m. When building the door and window openings, if the door and window frames are erected first, the bricklaying shall be about 3mm away from the door and window frames. If the back plug door and window frame, it should be built according to the position of the snap line (generally, the line width is 10-20mm larger than the actual size of the door and window).<br>