The workman who died following an accident at a building site at Langley Green School has been identified by Sussex Police as Daniel Clifford Yeowell.
Mr Yeowell was 26 and came from Gillingham, Kent.
He was fatally injured after being hit by a falling manhole cover at the site on Friday (October 4).
He died on Monday (October 7).
Work has been suspended while police and the Health and Safety Executive investigate the circumstances of the incident.
The building work is being undertaken by Balfour Beatty Construction Services to extend the school.
A Balfour Beatty spokesman said: “Balfour Beatty is working with The Health and Safety Executive and Sussex Police therefore, it would be inappropriate to comment further at this time.”