Extensometers for measuring elongation of rebar coupler, splice, and sleeve assemblies. Use for tension, cyclic, slip, and differential elongation tests.
The Model 3567 extensometer may be used for ASTM A1034 testing to measure strain and elongation during tension testing of rebar splice assemblies consisting of rebar and rebar couplers, coupling sleeves and splices. The extensometer measures strain through yield and may be used for tension, cyclic, slip, and differential elongation tests.
The extensometer may be left on through failure and includes suspension points for fall protection. It is designed to automatically release from the rebar splice assembly when the extensometer reaches full scale extension at 12.5 mm (0.5 inches), typically after specimen yield. The extensometer is suspended by a tether after it is released from the specimen. The upper arm incorporates mechanical stops that protect the extensometer from over travel.
The unit is self-supporting and mounts to the rebar using attachment collars above and below the coupler. The collars simply clamp on without any need for rebar surface preparation. Collars are available to work with all common rebar and coupling / splice sizes, including 6 – 60 mm (#2 – #18J) diameter rebar. Extensometer gauge length may be adjusted to any value from 95 – 675 mm (3.74 – 26.6 inches) with the standard model, and optionally up to 975 mm (38.4 inches).