Graphical Construction Glossary >> Roofs and roofing. >> Roof Types >> barrel roof

Barrel Roof
A roof with a semi-circular cross section or it forms half a cylinder.
Barrel Vault
A semi cylindrical vault.

Saigon central post office roof
A showcase renovation of a classic building. The Saigon Central Post Office.

A graceful 1930's roof. Note the clerestory windows and the monitor roof bringing natural daylight into a large space.

a barrel roof Nissan Hut.
A Nissan Hut used as a WW11 ammunition store. Charles Darwin National Park, NT Australia.

The photo above illustrates one of the main features of these roofs. It's high strength. Along the length of the semi-cylinder, these roofs are capable large spans.

These Nissan huts were made out of heavy roll formed corrugated galvanised steel sheets, about three sections to a semicircle and then as many of these half rings could be bolted together for whatever length that was required. A similar structure of the same era were the Quonset huts.

In the photo above the roof was covered with earth for further protection. As an aside to this photo, Darwin received over 240 air raids during WW ll.

Concrete barrel shell roofs are another form and when ganged together side by side they can span large areas.

Of course there are probably far more barrel vaults than roofs. The ancient Romans first used the semicircular arch which was then extended into vault for tunneled aqueducts etc.

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"What can be added to the happiness of a man who is in health, out of debt, and has a clear conscience?
Adam Smith 1723-1790

"When we build, let us think that we build for ever."John Ruskin 1819-1900

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Please Note! The information on this site is offered as a guide only!  When we are talking about areas where building regulations or safety regulations could exist,the information here could be wrong for your area.  It could be out of date!  Regulations breed faster than rabbits!
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