| 主权项 |
1. An improved grid shoring system comprising:
a one or more fixed beam-head prop assemblies supporting a one or more beams; each of said one or more fixed beam-head prop assemblies comprise an upper portion, a lower portion, a variable height, and a threaded collar; said upper portion having a screw-jack threaded shaft assembly; said screw-jack threaded shaft assembly comprises
a threaded shaft having an external diameter and an external threading andan upper attachment plate having a plurality of fastening apertures; said upper portion of said one or more fixed beam-head prop assemblies selectively slide into said lower portion of said one or more fixed beam-head prop assemblies; said threaded collar comprises an internal threading and an internal diameter; said internal threading of said threaded collar rotateably attaches to said external threading of said screw-jack threaded shaft assembly of said upper portion; said lower portion comprises a lower central shaft having an internal diameter being larger than said external diameter of said threaded shaft; said upper portion and said lower portion adjustably attach to one another by
selectively sliding said threaded shaft in an up and down direction through said lower central shaft of said lower portion, andvertically adjusting said threaded collar along said threaded shaft to select said variable height; said upper portion comprises a first end cap seat; said lower portion comprises a second end cap seat; said upper portion having a drop-head; said drop-head comprises a bottom plate having a plurality of fastening apertures; said screw-jack threaded shaft assembly attaches to said drop-head by
aligning said plurality of fastening apertures of said bottom plate of said drop-head with said plurality of fastening apertures of said upper attachment plate of said screw-jack threaded shaft assembly, andinserting and locking a one or more nut and bolt assemblies through said plurality of fastening apertures in said bottom plate and said upper attachment plate; said first end cap seat is selectively attached to said drop-head of said upper portion; said first end cap seat comprises a variable height; adjusting said variable height of said first end cap seat comprises adjusting said threaded collar between said upper portion and said lower portions of said one or more fixed beam-head prop assemblies; said lower portion comprising of a prop and a fixed beam-head; said fixed beam-head comprising
a central shaft having a central shaft having an internal diameter, a first end and a second end,a bottom plate having a plurality of fastening apertures, anda second end cap seat attached around and to said central shaft; said prop comprising
a central shaft having a first end and a second end, anda top plate having a plurality of fastening apertures; said central shaft of said prop comprises central shaft having a first end aperture and an internal diameter; and said plurality of fastening apertures of said top plate of said prop align and attach to said plurality of fastening apertures of said bottom plate of said fixed beam-head. |
