Book review: Guidelines for failure investigation (2nd ed.)

This month's letters continue to discuss the topic of gender balance, with readers making the case that diversity benefits business and proposing ways to address the current imbalance. Other topics include fire resistance in tall timber buildings, concrete and climate change, and the principle of virtual work.

£180 spent on a promotional postcard helped Steve Webb and Andy Yates create a business with a £5M turnover and offices in London, Birmingham, Bristol and Dubai.

This month's contribution from Ronald Cunningham FIStructE concerns bending moments and deflections in a portal frame.