This diy video shows how a window was installed in a wall to bring light into a small garage.
How to install a concrete lintel in an existing wall.
The aim was to undertake the work as cheaply and quickly as pos.
When propping a lintel a horizontal timber plank should be placed along the underside of the lintel and suitable props secured into place at maximum 1200mm centres.
Wedge the beam into the opening then pack any gaps with masonry mortar.
Install the steel lintel above the door.
It should only be introduced after initial masonry load has been applied to the lintel.
For example you need to consider the weight or the load which the lintel will have to carry.
You also need to consider the stress that will be applied to the lintel by the load above the opening.
Steel lintels in concrete block walls are placed in the mortar between blocks so the first step will be opening a space for the lintel itself.
With the intended position of the lintel marked on the wall carefully use an angle grinder or masonry saw to cut away the mortar.
The beam will distribute the weight of the wall s load to either side of the door opening.
If you plan to cut a hole in a brick wall you will have to install a lintel a flat steel beam to ensure that the brick wall does not fall down.
The practice of propping a lintel is sometimes used to facilitate speed of construction.