Cutting out masonry and insert lintel.
How to make an opening in a concrete wall.
Mark the opening size for the door on both sides of the wall.
Add another set of marks across the top of the frame to represent a steel lintel that will support the load above the door.
These holes will mark the boundaries of the opening and help guide your cuts.
The exact requirements depend on the forces acting on the structure calling for a minimum of one vertical bar along each side of each opening within 12 inches of the edge.
Forming an opening in a wall.
I need to add a couple windows in an existing concrete h block wall.
One problem is the blocks are not staggered.
They charge by the linear foot.
They are lined up vertically.
There are roughly 5 or 6 courses of blocks above where the window would be.
The international residential code specifies reinforcement schedules around openings in houses built with cast in place walls when the opening exceeds 2 feet in width.
Extenders make it possible to drill to almost any depth.
Drill through each corner of your cutout using a rotary hammer equipped with a masonry bit.
This should be 12 inches wider than the opening to allow it to sit on at least 6 inches of masonry either side of the opening you are about to make.
8 and 5 openings.
I have added windows or doors in the basement in my last couple of houses and i have determined that there is only one way to cut an opening in an 8 poured concrete wall.
When the above support is in place you can cut out for your lintel.
In addition to making straight on cuts a core drill can make cuts at virtually any angle.
They have the saws to get the job done.
While cuts are often made on walls and other vertical surfaces the operator can also make cuts on low and overhead horizontal surfaces as well as cuts on sloped surfaces.
Hire a concrete cutting company.