Green Roof Structural Loads

Of green roofs and recommended structural design specifications and strategies will also be presented.

Green roof structural loads.

Typically the entire green roof will have a uniform dead load based on the saturated weight of the green roof assembly though one may considering positioning planters or mounded growth media over structural support members to incorporate some strategically located deeper growth media for larger showcase plants. Structural engineers determine the loading requirements of a roof to resist live loads forces such as snow rainwater rooftop equipment green roofs and maintenance crews as well as dead loads the basic roofing structure and materials. Sullivan engineering is uniquely qualified in green. Intensive green roofs have more soil and a deeper growing medium sometimes several feet that can support a more diverse plant selection including small trees.

Specification drivers for green roofs. Thus they have more substantial structural loads and need more frequent maintenance and watering. A vast array of systems are available depending on the owner s budget intended use and roof deck load capacity. With one of north america s first certified green roof professionals as well as a leed ap on staff combined with our expertise in roof consulting and structural engineering.

Height of the green roof systems which will affect upstand requirements weight range of each system which may determine the structural support you need maintenance needs for green roofs and. Suitable applications for each green roof system. One cubic foot of dry agricultural dirt or loam typically used for a green roof weighs between 75 and 81 pounds. Semi intensive green roofs include features of both.

Is to assume that the green roof is a soil load rather than a dead load. The dead load of a green roof assembly should be determined on a project specific basis because growth medium composition varies from job to job. A structural engineer s advice is essential to ensure comprehensive design development based on the building s construction condition and weight loading capacity. Structural loads weight of green rooftops.

Green roof planting options. They are usually accessible. The load bearing capacity of a building must be known before planning a green roof wall or facade.