| 摘要 |
<p>A MOBILE CANTILEVER PLATFORM (200) FOR INSTALLATION IN AN ELEVATOR RISER (256) COMPRISES A FIRST PORTION (202) ARRANGED TO EXTEND FROM A WORKING AREA (254) ADJACENT THE ELEVATOR RISER INTO THE ELEVATOR RISER. THE MOBILE CANTILEVER PLATFORM ALSO COMPRISES AN ELONGATE RESTRAINT MEMBER (204) FOR INSTALLATION IN A NON-VERTICAL ORIENTATION (?) AND HAVING AN ENGAGEMENT MEMBER (206) FOR ENGAGEMENT WITH A SURFACE (258) OF THE WORKING AREA THEREBY TO RESTRAIN THE MOBILE CANTILEVER PLATFORM AGAINST ROTATION ABOUT A FULCRUM (F). A METHOD OF INSTALLING SUCH A MOBILE CANTILEVER PLATFORM IS ALSO DISCLOSED. A METHOD FOR CONSTRUCTION OR MAINTENANCE IN AN ELEVATOR RISER (602) COMPRISES INSTALLING A MOBILE CANTILEVER PLATFORM (604) FROM A FIRST WORKING AREA (610) ADJACENT THE ELEVATOR RISER INTO THE ELEVATOR RISER. A TEMPORARY SUPPORT STRUCTURE (606) IS INSTALLED ON THE MOBILE CANTILEVER PLATFORM WITHIN THE ELEVATOR RISER AND THE MOBILE CANTILEVER PLATFORM IS INSTALLED FROM A SECOND WORKING AREA (612) INTO THE ELEVATOR RISER.</p> |
