We have had a few issues with our building contractor and architect technician re a fully width single story extension (6m wide x 2.8 m deep)
1) Technician did not supply structural calculations to building control (BC). He originally specced RSJs at 2no 203x133x30kg UB
2) In absence of calcs builder went ahead and put in larger RSJ 2no 254x146 UB . Is this larger size / weight an issue ? Crack has appeared on floor above extension?
3) Tecnician now supplied calc (retrispectively after they were inserted by building contractor). Calcs are virtually unreadable and no evidence of sign off /certification from a chartered structural engineer and from the little fragment I can decipher relate to the original specs rather than the beams that actually went in???
4) Very confused by all this feel I am swimming in treacle - will BC control be able to sign off calcs with no indication of whether an appropriately qualified person produced them and also confused by the fact that the calc relate to plans and not the actual RSJ inserted by builder??
Help please
no vice novice
1) Technician did not supply structural calculations to building control (BC). He originally specced RSJs at 2no 203x133x30kg UB
2) In absence of calcs builder went ahead and put in larger RSJ 2no 254x146 UB . Is this larger size / weight an issue ? Crack has appeared on floor above extension?
3) Tecnician now supplied calc (retrispectively after they were inserted by building contractor). Calcs are virtually unreadable and no evidence of sign off /certification from a chartered structural engineer and from the little fragment I can decipher relate to the original specs rather than the beams that actually went in???
4) Very confused by all this feel I am swimming in treacle - will BC control be able to sign off calcs with no indication of whether an appropriately qualified person produced them and also confused by the fact that the calc relate to plans and not the actual RSJ inserted by builder??
Help please
no vice novice