	US 11,692,356 B2
	Fully-assembled staircase system and assembly method
Xiaoming Xu, Jiangsu (CN)
Assigned to CHANGZHOU VOCATIONAL INSTITUTE OF ENGINEERING, Jiangsu (CN)
Appl. No. 17/621,423
Filed by Changzhou Vocational Institute of Engineering, Jiangsu (CN)
PCT Filed May 26, 2020, PCT No. PCT/CN2020/092214 § 371(c)(1), (2) Date Dec. 21, 2021, PCT Pub. No. WO2021/184540, PCT Pub. Date Sep. 23, 2021.
Claims priority of application No. 202010189586.6 (CN), filed on Mar. 18, 2020.
Prior Publication US 2022/0259864 A1, Aug. 18, 2022
Int. Cl. E04F 11/035 (2006.01); E04F 11/09 (2006.01); E04F 11/18 (2006.01); E04F 11/02 (2006.01); E04F 11/116 (2006.01)

CPC E04F 11/035 (2013.01) [E04F 11/09 (2013.01); E04F 11/116 (2013.01); E04F 11/1812 (2013.01); E04F 11/1817 (2013.01); E04F 2011/0212 (2013.01); E04F 2011/1821 (2013.01); E04F 2011/1889 (2013.01)]

7 Claims

1. A fully-assembled staircase system, comprising: a stair slab LTB, stair steps, stair stringers TL, landing slabs PB, steel connectors GLJ, and a stair handrail, wherein a main body of the stair slab LTB is an inclined flat plate structure, lap joints are disposed at an upper end and a lower end of the stair slab LTB, an outer edge of an upper surface of the lap joint is provided with first grooves (1), one side of the landing slab PB is provided with second grooves (13), the stair stringer TL is an inverted T-shaped structure, a top surface of a web of the stair stringer TL is provided with third grooves (23), two flanges of the stair stringer TL are respectively fixedly lapped with the stair slab LTB and the landing slab PB, the first groove (1), the third groove (23), and the second groove (13) after the lapping jointly form a steel-connector groove, and the steel connector GLJ is placed in and fixed to the steel-connector groove.