Steel Bar Coupler Extensometer

1. Introduction
YYU-5/80-260mm special extensometer for steel bar coupler is designed in accordance with the technical requirements of "JGJ 107 2010 Technical Specifications for Technical Connection of Steel Bars". It is a two-way average extensometer specially used to test the residual deformation of steel bar joints. Adjust according to the steel bar diameter requirement.
It fully complies with the technical requirements of "JGJ 107 2010 Technical Regulations for Reinforcement Connection".
Deformation measurement gauge length:L1=L+4d
In the formula: L1——deformation measurement gauge length;
L — length of mechanical joint;
d - the nominal diameter of the steel bar.

2. Standard
JGJ 107 2010 Technical Regulations for Reinforcement Connection.

3. Parameters
1) gauge length: 80~260mm continuously adjustable, suitable for test requirements with a diameter of 12~40mm.
2) Measuring range: The maximum tensile range is 5mm, which meets the tensile requirements of all specifications of steel coupler.
3) Accuracy grades Meet the requirements of grade 0.5 extensometers.
Stretch the maximum measuring range 5mm. 0~1.5mm inward and return error meets the requirements of 0.5-level extensometer (meets the requirements of 0.6fyk residual elongation test)