CROSS-UK Newsletter 63 has been published and includes expert comment on fire safety and structural safety reports.
Newsletter content
Concerns about punching shear in a flat slab
This report concerns potential shear failures in flat slabs. This originates from inconsistent design and detailing of the shear reinforcement where a proprietary shear link system is assumed in the design but not followed in detailing.
Misleading fire rating on hatches
Retrospective fitting of various amenities including TV aerials, broadband, and satellite connections, may result in new access points being made in walls, ceilings, or through floors. These openings need to be made good using a method that provides the required fire safety properties for that specific situation, including integrity, insulation, and resistance to smoke spread.
Steel truss failure during lifting operation
The lifting operation for a 40m long span steel truss had to be abandoned after the localised failure of a joint.
Fire protection of light gauge steel frames
A reporter is concerned that there is a lack of understanding regarding system testing and associated procedures, the purpose of fire assessments, and the role of materials that contribute to the structure’s fire protection.
Sudden failure of storage silo
A 5,000 ton capacity storage silo containing ground granulated blast-furnace slag (ggbs) split apart suddenly and without warning onsite at a concrete production facility.
Front doors in blocks of flats - security versus safety?
Fire doors in blocks of flats changed for security doors not meeting fire safety requirements.
Safety issues when adding PV panels to existing roofs
A reporter raises concerns over the lack of structural engineering knowledge and dangerous assumptions, that they have seen, in assessments for the installation of photovoltaic (PV) panels for a number of buildings.
Beam and block floors fire resistance
A report has been received about unsubstantiated claims of fire performance and the unavailability of test data for a specific form of construction.
Inadequate temporary works on domestic project
An example of inadequate temporary works on a project, and problems reporting the safety issue to the authorities.
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