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yes its a steel hollow section with plate checked and there`s no insulation thrugh middle either

Few queries on my builders work need clarification before i ask them: Timber joists infilling- Rear Extension builder has infilled between timbers with concrete block with no mortar yet my house which is around 7`s year old has mortar beds either side of blocks which is correct...

thanks for comments see attached calcs

it needs to take 4 course of blocks wood no the 2

returns are 900mm no posts woody, flat rood only carried on internal leaf of beam external 900mm of parapet block wok

will speak with structural tomorrow beam is UB254x102x22 with an 8mm welded bottom plate looks like the plate that is rotating only a beam has no flex really dont want too add a mid point post if i can help it. just measure ed of beam and looks like builders have installed correct beam.

4 course of block above beam are required, might have to put a central pier in to stop the sag now not what we wanted but might rectifiy problem.

7.5m opening beam i think is 254x 19

the brickies have started loading out steel beams over patio opening on friday was in the garden today a look a bit off to the eye so measured this with a lazer level and tape and it would appear at the mid point its 20mm lower that the ends but only on the welded flat plate section not the UB...

do you need to bed steel beams onto concrete padstone or can they just go straight onto pads.

i would like to opening in for an new external door way close to the corner of my existing house now that the rear single storey extension as been built, is there any guidance to say this is not allowed.

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i have 2 questions related to flat roof joists. joists 4x2 400mm centres Q1: Can the joist sit directly on top of steel UB then block work either side and above or is a timber wall plate required? Q2: wall plate / leadger board connected to existing cavity wall, what size threaded rod is...

3 courses of Trench blocks have drifted inwards at the end of the run, shall i overhang inner blocks or bring everything in 20mm and reduce 100mm cavity to 80mm cavity is full fill batts ?

yes its been designed at a min of 300mm pier, the reasoning for the floor slab is i have saw clips on youtube of installation of bifolds and they all seem to be directly on to floor slab rather than inner brick leaf

Q1 I have on the drawing a 7n block pier between 2 bifold doors, the width is 440mm should i half a block and alternate courses to both inner and outer leaf or will stacking them on top be stronger. Q2 when pouring the base slab is it better to pour rght up to outer skin below the door...

I have 2 foul plastic pipes cutting through my foundations, which I have shuttered either side by 100mm to full depth of trench. So effectively I now have a 300mm wide full depth cutting within the foundation run in 2 places. Question: Is this correct or should I be still pouring concrete...

I maybe, been signed off by building control to so what do you go with

hi maybe its because the new extension is block and render rather than brick and block