As part of the on site QC team, I am concerned about thermal cracking in some up-coming pile cap pours which are over 10 ft thick, 15 ft wide and 20 ft long. However the designers have declared that these are not really mass concrete pours and no speacial precations need to be taken.
1. If...
As part of the QC team on site I am concerned about thermal cracking on some up-coming pile cap pours which are over 10 ft thick, 15 ft wide & 20 ft long. However the designers advise that these are not really mass concrete pours and no speacial precautions need be taken.
1 If none of the...
As part of the QC team on site I am concerned about heat of hydration and thermal cracking on several up-coming pile cap pours which are over 10 ft thick, 15 ft wide & 20 ft long. However the designers have advised us that they are not really to be considered as mass concrete pours and we need...
We are currently constructing several low rise (2, 3 & 4 story) office buildings. All cast in place with concrete shear walls. The column spacings and beam spans are quite uniform so we are looking for ways to pre-fab the beam cages & slab steel and drop them into place. I recon this could be...
Many detailers use offset bars (slightly bent on a 1:6 slope) to facilitate placement of lap splices. My common sense tells me they should not be allowed in areas of maximum tensile stress, but unless I have missed something, ACI does not seem to clarify where they can or cannot be used. Can...
We are currently designing and constructing several low rise (2-3 floor) commercial office buildings (all reinforced concrete construction). We have relatively good soils (5000 psf bearing capacity) and our geotechnical engineer has recommended conventional spread footing foundations. However...
