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CROSS regions
Overloading a portal frame with suspended services
A reporter designing a single storey portal frame used a standard roof service loading of 0.25kN/m2. After the project was completed, a tenant for the unit took over fit out and added a considerable amount of sprinkler pipework into the roof. This created local overloading.
21 August 2023
CROSS Safety Report
Report ID: 1195
Region: CROSS-UK
Removal of internal structure
The roof trusses, 6m above the ground floor, had been left supported on props made by nailing floor joists together; one at each party wall position.
1 July 2006
CROSS Safety Report
Report ID: 46
Region: CROSS-UK
Timber truss
The reporter has been dealing with an application where the engineer involved discovered proprietary timber girder trusses with some glued joints that have come loose.
1 February 2007
CROSS Safety Report
Report ID: 62
Region: CROSS-UK
Very slender props
A reporter noticed prop that did not have ties installed while carrying out a site inspection.
1 July 2007
CROSS Safety Report
Report ID: 34
Region: CROSS-UK
Lightweight steel roof partial collapse
A hall constructed from thin cold rolled steel sections riveted together started collapsing when tiles were loaded on one side only.
1 April 2014
CROSS Safety Report
Report ID: 383
Region: CROSS-UK
Roof constructed without structural input
A reporter wants to highlight the problem of builders working off plans provided by an architect or surveyor and assuming that section sizes shown on their drawings are structurally adequate.
1 January 2016
CROSS Safety Report
Report ID: 515
Region: CROSS-UK
Failure to maintain roof drainage during re-roof leads to ponding stability collapse
A roof collapsed while the building’s roofing membrane was being replaced.
1 March 2020
CROSS Safety Report
Report ID: 864
Region: CROSS-US
Failure of existing long-span wood roof truss following installation of new roof-top HVAC units
Failure of an existing long-span wood roof truss following installation of new roof-top Heating, Ventilating, and Air Conditioning (HVAC) units offers lessons in the special challenges of renovations to existing buildings.
1 September 2020
CROSS Safety Report
Report ID: 949
Region: CROSS-US
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