Assertion: building's roof | /r/HasAspect | rafter
Facets:
value: at 600 mm
type: OTHER
value: in the uk
type: LOCATION
value: normally
type: DEGREE
Source sentences:
text: In the UK, a concrete tiled roof would normally have rafters at 600 mm (24 in) centers, roof battens at 300 mm (12 in) centers and ceiling joists at 400 mm (16 in) centers.