The utility model discloses a simple and easy device suitable for angle deviation quantitative measurement of I -
steel frame shed, include: bush, bar piece and clamp, both ends of bar piece all have the sliding joint of bush, one end of bush away from bar piece is equipped with clamp, and the inside of bar piece is equipped with the
liquid storage cavity, is equipped with the liquid of color in the
liquid storage cavity, is equipped with the scale on the outer surface of bar piece, and bar piece adopts transparent material to make, the utility model discloses can accurately show the shed leg angle deviation condition, not only can realize the real -time
continuous monitoring of roadway surrounding rock, can effectively avoid the error produced in the operation process to can provide decision basis for roadway support personnel to provide convenience and
security guarantee for roadway staff.