Green Roof Weight Psf

Green roofs in environmental terms 5 2 benefits in human terms 5 3 green roof technical considerations 5 5 design considerations 5 8 implementation considerations 5 11 maintenence considerations 5 13 6 implementation resources internet resources 6 1 reducing new york city s urban heat island effect ddc 2004 6 5.

Green roof weight psf.

They support hearty native ground cover that requires little maintenance. Intensive green roofs weigh from 35 pounds to beyond 100 pounds per square foot when dry it is all a matter of the soil depth which is affected by the amount of mounding that is used. Green roof system weights columbia green technologies 79 se taylor st. Large trees up to 15 m.

The weights of other actual products of the same type may vary. Medium trees up to 10 m. When preparing a green roof calculations must always be based on the water saturated weight of the total structure. Tray systems are not a viable option for intensive roofs due to the weight.

Extensive green roofs are relatively light at 15 50 pounds 7 23 kilograms per square foot. Perennials and low shrubs up to 1 5 m. Small trees up to 6 m. Pounds per square foot lb ft 2 pounds per square 100 sq.

These are the weights of typical actual products. Green roof vegetation type. The foot or more of growing medium needed for an intensive green roof creates a load of 80 150 pounds 36 68 kilograms per square foot. Green roof vegetation weight loadings.

Mid range 5 inch systems weigh approximately 34 pounds per square foot and are compatible with wood or steel decks. Weight of roofing materials. Therefor a significant amount of attention must be paid to the various. On a roof with a slope greater than 4 to 12 the live load limit is typically adjusted downward from 20 psf to 15 psf to allow for the relatively greater dead load on the steeper roof.

Weight loading kg m 2 low herbaceous succulents and grasses 10 2. Asphalt shingles 3 tab or strip 1 95 lbs. Heavier intensive green roofs generally require a concrete supporting deck. Ft kilograms per square meter kg m 2 source.