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Fire compartmentation detailing issues
Two reports have been received concerning fire compartmentation detailing issues; one on the incorrect installation of fire batts and the other on the incorrect use of intumescent material.
Unsafe excavation practices
A builder undermined the existing footing of a masonry wall without being aware of the risks.
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.
Wall tie design between masonry panels and timber frames
This report discusses the potential for failure of timber frame wall ties between masonry and timber in moderate to high wind conditions.
Inadequate brick ties in gable walls
A reporter was called to council houses at four different sites, whose upper triangle of cavity wall brickwork on the gable end had fallen out, due to not being tied into the roof.
Contractor uses incorrect fixing bolts for masonry support angles
A correspondent noticed that proprietary masonry support angles specified to support the outer leaf of masonry had been incorrectly connected to the steel beam using carriage bolts.
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Wind loads acting on timber frame walls for designs to BS 5268-6
A reporter says that the masonry shielding factors in BS 5268-6 (K100 and K200) were substantially reduced when PD 6693-1 for designs to EC5 was produced.
Shutter failure during concrete wall pour
A reporter describes how a shutter failed during a concrete wall pour due to resin fixed ties not being allowed to cure.
Lack of method statements on domestic projects
A reporter has observed that where an opening is being formed on domestic properties for, say a rear extension, that the builders tend to remove the masonry and follow up with the temporary propping.
Concerns with propping design to large excavations
Concerns are raised about the design of propping to large excavations and particularly about the design of the connections for a raking prop to a horizontal waler.