In a larger sense – a much larger sense – the unexciting roof is really the keystone of civilization. We think of them as necessities and not much else. Like so many other man-made innovations that have been around forever, we take roofs for granted. It’s also a simple feat of engineering, channeling water down slopes into valleys and along eaves, directing the flow away from the walls and foundation. ![]() This includes items like beams, girders, rafters, purlins, hold downs, connections, etc., that are shown graphically and are called out and sized.Have you ever stopped to think about the significance of a roof? We all realize it’s that thing covering our homes, protecting us from the elements and insulating us from the cold. This allows the contractor to see the overall arrangement and pattern of the framing elements. The roof framing plan is a structural drawing that removes the outside layers of the roof so the framing members can be seen. It doesn’t show any interior elements of the building, only what can be seen from the outside. The roof plan is a drawing based on a view from above the building looking down. Clearly indicate the edge of the building with a heavy line Roof Plan vs Roof Framing Plan.How is maintenance done on a commercial roof? Is the roof accessed by a ladder, a ship’s ladder, or stairs? Do you need a roof hatch, or do the stairs lead to the roof?.Follow the flow of rain all the way to the ground or to drainage piping and see if there are any collection points or breaks in the path. These can all be graphically represented or indicated with annotations on the roof plan. Tags, keynotes, and/or hatches can indicate which portions of the roof are built with a specific assembly to help clarify the scope to the contractor.įor example, a building might be designed with a portion of the roof that is flat with a TPO membrane, a portion that is sloped with a standing seam metal roof, a portion of the roof that is occupiable and uses pedestals and pavers for people to walk on, and a portion that utilizes a green roof tray system. Multiple roof types or assemblies might be used for a complex roof, particularly in commercial projects. Often, assemblies are more appropriately described in the sections and details and can be shown graphically as well as described with text. ![]() Roof plans may or may not describe materials or assemblies.
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