Complete issue (April 2021)

This month's letters address the topics of responsibility for buildability of projects, the embodied carbon of steel and concrete, and carbon comparisons between materials, among others.

Editor-in-Chief, Leroy Gardner, has selected a paper on ‘Robustness of steel truss bridges: Laboratory testing of a full-scale 21-metre bridge span’ as his ‘Featured Article’ from the February 2021 issue.

An obituary of influential structural engineer Leslie Robertson, who led the project to build the twin towers of New York's World Trade Center.