Advisory Note

This Advisory Note was produced by a joint working group of the Institution of Structural Engineers, the Department for Transport, Local Government and the Regions and the Department for Culture Media and Sport and should be read in conjunction with the Interim Guidance

The Interim Guidance require management concerned with the operation of grandstand facilities to know the value of the lowest natural frequency of vertical vibration of any stand or seating deck of a size covered by the Interim Guidance.  If the values of natural frequency are not known, the Interim Guidance recommends that ‘Management should appoint a suitably experienced engineer (consult the IStructE list) to undertake calculations and advise on the appointment of an experienced Test Agency to establish natural frequencies and other relevant parameters’.

This Advisory note is addressed to both management and the engineer concerned with procuring the required testing and using the results.