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Specification issue with steel hollow sections
A reporter raises concerns after their structural engineer had failed to specify the steel grade used in the design for hollow sections on two projects.
Steelwork splices do not match design calculations
Remedial works had to be carried out after it was found that steelwork splices on site did not match calculations which were retrospectively provided by a contractor.
Lessons learned from the 2018 Florida bridge collapse during construction
This was a bridge of an unusual design and was being constructed in an unusual manner. The main 53m pre-stressed pre-cast concrete span truss was in position when cracks appeared at a node and over a period of almost three weeks they visibly worsened until collapse occurred.
Suspended ceiling replacement in high rise block
A reporter was involved in replacing a suspended ceiling after a few loose panels had fallen, resulting in a minor injury in one case.
Crane outrigger loads underestimated due to misuse of software
A reporter is concerned about how the misuse of software can lead to incorrect outrigger loads being used in the design of foundations for crane outriggers.
Unconservative design of flat slab due to software modelling issues
A reporter discusses how a design/modelling problem caused an under-designed reinforced concrete (RC) slab to be constructed.
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Response to report 614 on missing columns from drawings
A reporter shares their views on how to implement robust checking systems for Building Information Modelling (BIM) models.
Concrete grade confusion in software
A reporter noticed that the design calculation report generated by a proprietary software package called for ‘concrete characteristic strength = 45N/mm2’, but did not confirm whether this refers to the cylinder or cube strength.
Bridge bearing design and installation - further concerns raised
A reporter says that the issue of successful co-ordination between designers, contractors and specialist bearing suppliers is one they have experienced.
Casting, transporting and installing precast concrete kerbs
A reporter shares their experience of how collaborative engineering thinking involving several parties enabled a design solution to be found that could be constructed safely.