A DEVICE FOR MEASURING STRAIGHTNESS AND SQUARENESS OF WALLS, FLOOR AND CEILING OF BUILDING STRUCTURES AND THE LIKE

A device for measuring 'square' of a building structure having walls, floors and ceilings, the device includes: a substantially longitudinal body having a mounting portion for receiving a handle member, and one or more level indicators; a handle member wherein the handle member is adapted to be adjustably mounted on the mounting portion of the body to allow selective positioning of the handle member relative to the body; a marker device adapted to be mounted on a portion of the longitudinal body of the squareness measuring device, the marker device including: a support pole mountable to the longitudinal body, a mounting structure on the longitudinal body for receiving a canister of a marking fluid, wherein the mounting structure further includes a trigger mechanism which initiates release of marking fluid from the canister when the indicators on the square measuring device indicates off square, wherein the mounting portion of the body includes a releasable locking means which locates the handle member substantially perpendicular to the body in an operating condition for performing square measurements of floors, walls and ceilings of the building structure or the like, and in a released condition the locking means allows the handle member to fold against the body. vo L 00 ri~ 14 -Go 304, las'tlwvt I4, IiWO /r.