As reported in Caunton’s web site news on 12 May 2021, Caunton Engineering had constructed a blast box for warhead testing at The University of Illinois using the Steel Bricks™ modular system, which it developed in the UK with the Steel Construction Institute under license from Modular Walling Systems. The steelwork was shipped to the USA earlier this year. The blast box (internal dimensions 10ftx10ftx10ft) is now installed at the High Explosive Test facility of the University of Illinois. This is now one of the largest enclosed test chambers at any US university. The chamber can now test high explosive articles of up to 10lbs of TNT and that it has a capacity to withstand 50 psi (345kN/m2.
The University has issued a video of progress which can be accessed using this link.