Steel Roof Hatch Designed to Provide Convenient, Economical Access to the Roof of a Building. Each unit comes with an insulated, self-flashing, 12"High curb and a staple for a padlock on the inside and outside. Each unit is supplied with lift assisting mechanisms and an automatic hold open arm. Self latching zinc plated outside T handle & inside stainless steel slam lock. 1 Latch. Gray Finish. 32"W x 32"H Outside Flange Dimensions. 24"W x 12"D x 24"H Return Flange Dimensions.