Currently renovating a basement and planning to enlarge a window and a door in an exterior wall made of lightweight concrete (it's a single-story house on a slope with a basement).
There is currently a window that is 60x60 right at the ceiling height. I want to lower it a bit and install a larger window (B140, h100), and for that, I probably need to reinforce for the inter-floor structure. With the help of this forum, I've figured out that the beam must overlap the window by at least 150mm on each side, which means it has to be a minimum of 170 long. But how thick does it need to be? I'm thinking of using an HEA Beam.
Further, about 1.5 meters to the left of the window, there is currently a "dwarf door" about 170 cm high. I want to enlarge it to a normal-sized exterior door, which would mean the beam becomes at least 130cm long. Again, the dimension is the question.
I assume this is difficult to answer without actual numbers. I'll probably have to bring in a builder for advice eventually. But it would be interesting to hear about others who have done similar projects, what dimensions they used, and if there is any "standard" for what to use for a 140 window and a 100 door with an upper floor.
Novice as you can tell....
There is currently a window that is 60x60 right at the ceiling height. I want to lower it a bit and install a larger window (B140, h100), and for that, I probably need to reinforce for the inter-floor structure. With the help of this forum, I've figured out that the beam must overlap the window by at least 150mm on each side, which means it has to be a minimum of 170 long. But how thick does it need to be? I'm thinking of using an HEA Beam.
Further, about 1.5 meters to the left of the window, there is currently a "dwarf door" about 170 cm high. I want to enlarge it to a normal-sized exterior door, which would mean the beam becomes at least 130cm long. Again, the dimension is the question.
I assume this is difficult to answer without actual numbers. I'll probably have to bring in a builder for advice eventually. But it would be interesting to hear about others who have done similar projects, what dimensions they used, and if there is any "standard" for what to use for a 140 window and a 100 door with an upper floor.
Novice as you can tell....