Patent classifications
E
FIXED CONSTRUCTIONS
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E04
BUILDING
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E04B
GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
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7/00
Roofs; Roof construction with regard to insulation
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E04B7/02
with plane sloping surfaces, e.g. saddle roofs
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E04B7/022
consisting of a plurality of parallel similar trusses or portal frames
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E04B7/024
the trusses or frames supporting load-bearing purlins, e.g. braced purlins
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