I need to obtain or make one for a builders opening which is 720mm wide, of standard brick construction on a flat wall.
You can buy a kit of parts with front, back throats and all manner of integrated bits. I just want a standard concrete lintel with a 45º chamfer that's up to the heat.
Anyone know where from or how I make one?
I guess if making I need a cast and some steel rods, any other advice for making sure it's up to the job?
TIA