Patent ID: 6830127
Filing Date: 2004-12-14
Classification: E02D,E04F

Abstract:
Buried pipeline construction laser alignment survey platform comprising:a) platform deck constructed of grating, the platform deck having an access opening and a slideable access cover, the access cover being slidably affixed to the platform and slides under the platform deck on slide rails attached to the bottom of the platform deck, the access cover being slideable and securable to a closed set-up position, an open access position, and a partially open laser alignment position; b) anchor means for positioning the platform on top of a manhole section and for securing the platform to the manhole section; c) safety barrier means for providing a worker safety barrier at the perimeter of the platform deck; and d) access cover locking means affixed to the platform deck and securing the access cover in the open, closed and partially open positions by insertion of the locking means through aligned openings in the platform deck and access cover.