Technical Building HS2’s giant ‘Lego’ viaduct The Thame Valley Viaduct on HS2 is being built from giant precast blocks weighing up to 90 tonnes. Hamish Champ watches as this offsite manufacturing marvel is slotted together.
The July/August 2026 issue of Construction Management magazine is now available to read in digital format.
Construction clients are not happy about contractor workmanship. Find out more in the 2026 Construction Management and CIOB client survey.