G1 gauge : Crack with parallel edges in an exterior structure or in damp room

G1 gauge with angle bar : Crack in an horizontal or vertical internal angle in an external structure or in damp room

Parrallel edge crack in interior or exterior quality structure: choose G1 gauge with protective cover

G1.1 gauge : Crack with parallel edges in an interior structure

G1.1 gauge with angle bar : Interior crack in a horizontal or vertical internal angle

>G1.2 gauge (transparent and unobtrusive) : Parallel edge crack in an interior or exterior quality structure

G2 gauge (maximum-minimum recorder) : Crack with opening varying with the seasons

G3 gauge : Crack not flush or mismatched, distortion of a structure

Sagging of flooring or of a beam; increase in sag: Choose the G3 gauge with special device

3Dim. gauge : Complex distortion of a joint or a structures in 3 dimensions

Jauge G4 : Fissure sur support éloigné et d’accès difficile

G5 gauge : Sagging of a balcony, lean of a low wall, inclination of a retaining wall

G6 gauge : Crack with billiard cue edges

G6 gauge : Crack with billiard cue edges