then we started to build concrete arches over the revetments. They were maybe 18"thick and the concrete was simply poured between two "quonset hut" roof sections.
gums,
That style of shelter was still present at Tan Son Nhat when I first went to Saigon in 1995. One had a .50 cal tripod on the roof and another one had a mortar bomb hole in it.
Although they weren’t used for storage, they survived until they were demolished a couple of years ago. Some of the revetments are still there, as are some of the aircraft abandoned in 1975!