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Understanding finite element analysis for pile caps
A reporter questions the validity of using two-dimensional finite element (2D FE) shells to model structural elements such as pile caps.
18 October 2023
CROSS Safety Report
Report ID: 1152
Region: CROSS-UK
Incompetent design of simple steel beams
This report concerns designs for simple steel beams submitted to building control bodies under Part A of the Building Regulations. The reporter, a checking engineer for a building control body, was not able to accept the effective length and restraints assumed in a number of submitted designs. Most originated from individuals who used proprietary structural design computer packages without, i...
24 May 2023
CROSS Safety Report
Report ID: 1183
Region: CROSS-UK
RAAC planks in a 1970s shopping centre
An existing large shopping centre built circa 1975 had a number of external storerooms and loading bays with roofs constructed using reinforced autoclaved aerated concrete (RAAC) planks. The planks had deflected to the extent that they needed replacing.
20 February 2023
CROSS Safety Report
Report ID: 1155
Region: CROSS-UK
Construction period of RAAC planks
A reporter says that there are structural issues with reinforced autoclaved aerated concrete (RAAC) panels installed in a building as late as 1998. This date is significantly later than previous reports suggest as the last significant use of RAAC elements in the UK.
20 February 2023
CROSS Safety Report
Report ID: 954
Region: CROSS-UK
Design of timber structures
An approximate design led to a timber roof deflecting considerably.
1 November 2005
CROSS Safety Report
Report ID: 17
Region: CROSS-UK
Failure of waling beam connected to raking prop
A reporter discusses how they witnessed the failure of a temporary support for an excavation on site due to similar design issues discussed in CROSS report 298 (Props to large excavations).
1 July 2019
CROSS Safety Report
Report ID: 813
Region: CROSS-UK
Proprietary software for cantilevers
A reporter discovered an error in a proprietary software program.
1 October 2013
CROSS Safety Report
Report ID: 391
Region: CROSS-UK
Computer analysis and slab design twisting moments
A reporter has noticed on many occasions when checking reinforced concrete and post-tensioned slab designs that engineers often neglect to consider twisting moments when arriving at slab design moments.
1 October 2014
CROSS Safety Report
Report ID: 441
Region: CROSS-UK
Incorrectly installed tension control bolts could have led to serious consequences
A reporter finds incorrectly installed system HRC preload bolt assemblies, better known as tension control bolts, during a site inspection of a new highway bridge over a railway. The incorrectly fitted bolts could have had major structural implications, and led to other safety risks, if the installation error had not been spotted.
24 May 2023
CROSS Safety Report
Report ID: 1196
Region: CROSS-UK
Steel balconies fixed to precast hollowcore floor planks
A reporter is concerned about the suitability of providing a retrofitted steel balcony requiring moment connections to the sides of typical hollowcore floor planks.
1 July 2017
CROSS Safety Report
Report ID: 620
Region: CROSS-UK
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