Foundations, see93.020
ICS Field
91.060.01 Elements of buildings in general
91.060.10 Walls. Partitions. Façades
91.060.20 Roofs
Including related elements (gutters, etc.)
91.060.30 Ceilings. Floors. Stairs
Including screeds, ramps, etc.
91.060.40 Chimneys, shafts, ducts
Including flues and flue pipes
91.060.50 Doors and windows
Including doorsets, their components, blinds, shutters
Door and window hardware, see91.190
91.060.99 Other elements of buildings