John CrannaJan 9, 20231 minFolding and sliding door openingsA common request for structural engineers it design the steel beam to support the structure over opening for sliding or folding doors, as...
John CrannaNov 1, 20221 minBarn surveysClass Q development I carry out many surveys of barns and other redundant farm buildings for farmers and landowners who wish to convert...
John CrannaOct 26, 20211 mininterlocking brick lintelWhen I was walking around the streets where my dad is in a care home, I came across this interesting interlocking flat brick arch lintel....