Waterproof stripe has modulus formula telescoping device and bridge of lower support

The utility model provides a waterproof stripe has modulus formula telescoping device and bridge of lower support relates to the expansion joint, and a waterproof stripe has a modulus formula telescoping device of lower support, including two boundary beams, still include well roof beam and joist, the roof beam all supports and installs on the joist in each boundary beam and each, each zhong liang with and its just right boundary beam or another in all adopt waterproof stripe to be connected between the roof beam, each boundary beam all has first slide, two opposite flanks of roof beam all have the second slide in each, some coincide between each second slide and the first slide that corresponds or the second slide that corresponds, and each first slide and each second slide all are located and correspond waterproof stripe under, still provide a bridge, including above -mentioned telescoping device. The utility model discloses in form the shutoff to the expansion joint through waterproof stripe, can be waterp