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Tower crane base designs
A reporter’s firm has been involved in the design and checking of numerous tower crane bases and have come across many examples where the supplier of the tower crane has supplied incorrect loadings. These incorrect loadings could have led to crane failures had the errors not been spotted.
7 June 2022
CROSS Safety Report
Report ID: 1093
Region: CROSS-UK
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.
29 March 2021
CROSS Safety Report
Report ID: 916
Region: CROSS-UK
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.
13 December 2021
CROSS Safety Report
Report ID: 1050
Region: CROSS-UK
Building regulations submissions
This report has been written on behalf of a group of senior local government structural engineers who refer to previous CROSS newsletters and in particular the reports relating to the poor quality of building regulation submissions and lack of checking resources.
1 July 2007
CROSS Safety Report
Report ID: 65
Region: CROSS-UK
Effect of staff change on a design
A reporter illustrates how risk can be generated from staff turnover.
1 October 2012
CROSS Safety Report
Report ID: 277
Region: CROSS-UK
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.
1 April 2019
CROSS Safety Report
Report ID: 788
Region: CROSS-UK
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.
1 April 2020
CROSS Safety Report
Report ID: 915
Region: CROSS-UK
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