Abstract: A hoist apparatus for lifting objects up the side of a building or the like and swinging the objects onto the roof or other surface. The hoist can be erected and operated by one person and can be folded into a compact, easily moved, package. A pair of spaced triangular leg assemblies are typically clamped to the edged of the roof parapet in a spaced relationship. Each triangular assembly when installed for this use is made up of a first leg formed by one beam that is a vertical portion of the clamp and a flexible extension, such as a chain, extending from the lower end of the beam, a second leg secured at one end to the free end of the extension and a third leg pivotally connected between the second ends of the first and second legs, forming a triangle with an acute angle between the second and third legs. A cross beam extends between the second and third leg connections and is adapted to carry a hoist, typically a block and tackle arrangement.