Hi All
I have a 5 ft deep brick inspection chamber on my drive.
Its 1.2m x 800 ish
I am going to reduce it by spanning the 800 width with one of the below options
1 - several 6x4 concrete lintels
2 - several small steel RSJ's
3 - shutter it, add rebar and pour an 8 inch deep slab
4 - 10...