Green Roof Structural Loads

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.

Green roof structural loads.

Saturated with water the weight can increase by as much as 35 to around 100 to 110 pounds per cubic foot. 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. 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. Is to assume that the green roof is a soil load rather than a dead load.

The load bearing capacity of a building must be known before planning a green roof wall or facade. Of green roofs and recommended structural design specifications and strategies will also be presented. 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. Suitable applications for each green roof system.

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. Green roof planting options. A structural engineer s advice is essential to ensure comprehensive design development based on the building s construction condition and weight loading capacity. 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.

A vast array of systems are available depending on the owner s budget intended use and roof deck load capacity. Note that the use of soil load h in the asce load combinations was intended to cover lateral earth pressures. Astm e2397 is the established standard procedure for determining the dead and live loads associated with green roof systems. Semi intensive green roofs include features of both.

They are usually accessible. Sullivan engineering is uniquely qualified in green. Structural loads weight of green rooftops.