four - gagg
- four way reinforcement
- four-centred arch
- four-centred pointed arch
- four-edge trimming saw
- four-panel door
- four-way reinforcement
- fourteen inches
- fox tenon
- fox wedge
- foxtail wedge
- foxtail wedging
- foxy timber
- foyer
- fraction d’argile
- fracture
- fracture load
- fragment of broken tile
- frame
- frame bent
- frame building
