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Dear EireChch & HTURKAK, Thank you both for the time spared to go through the paperwork and give your opinion on the matter. Will keep you updated once we get to the bottom of the issue. Wish you both all the best.

Hi EireChch, Thank you very much for your guidance. I would define "major sinking" as few cm drop and large cracks. Below is part of the subsidence report where damage is classified as slight and I have few photos showing minor cracks and the wall ties been ripped off the existing wall. I...

Dear all, UK based project which baffles me the last few months (years of design experience in mainly residential works and this is the first with such issue) A new build single rear storey extension of say 2.50m wide x 10m in length (build within the past 6months) has sudden minor sinking...

Thanks BA, I' ve read lots of your other comment on various topics and must say you are a very noble person to spare personal time and share your massive knowledge with people like me. Wish you long years and good health. Peter

Hi all, I surveyed a moment frame the other day that is supposed to support first floor, roof and wind load because my client has the ground rear wall demolished for opening to the new extension. frame is roughly 4.5m wide and 3 high made of UC steel sections. The problem comes from that the...

BAretired, I just say that the piles specified have this capacity, the actual unfactorized load is around 20-25kN/m and in 2m c/c piles it comes to 20-25kN shear per pile. It's a small project and typically the soil and suitable depth is checked by the BCO just before concrete is poured. I...

Thanks Michael, Good afternoon from London. I will try to speak with the building control officer tomorrow and ask for his advice as well, but from what you say guys I assume we will have to go for a deep footing. Will update the thread once I have the advice from the BCO. Kind Regards

Hi MSQUARED48, Thanks for the reply. But isn't that why we provide movement joints when connecting new to existing structure?

Hi to all, I am a junior structural engineer from UK. Will appreciate some help from more knowledgeable engineers. I am designing the structure for a three extensions - to the side,rear and front of one house. The side one is two-storey the rear and front just one. Location is in predominantly...