Nyc Roof Drains For Set Back Roof

Size and placement of rooftop equipment may necessitate additional roof drains.

Nyc roof drains for set back roof.

The flow rate used for sizing the storm drainage piping shall be based on the maximum anticipated ponding at the roof drain. The clamping collar secures the membrane at each drain to ensure a water tight seal. An extensive green roof system installed atop the nyc department of parks and recreation s dpr five borough building on randall s island. The published roof drain flow rate based on the head of water above the roof drain shall be used to size the storm drainage system in accordance with section 1106.

The membrane is cut out at each drain and is secured by the drains clamping collar. Strainers shall have an available inlet area above roof level of not less than one and one half times the area of the conductor or leader to which the drain is connected. When placing roof drains it is good design practice to locate the drains no more than 50 feet from the roof perimeter nor more than 100feet apart. Epdm roofs are water proof and tend to be expensive.

Even on roofs without hvac equipment fall arrest is required for roof drain and roofing inspection. It is important to remember that no roof area should ever have less than two roof drains. The roof drain is usually set in the deck and the membrane is stretched over the entire roof. This modular system is one of six variations installed on the roof and covers 800 square feet con sisting of two foot by two foot trays with six inches of mineral soil and over 1 500 sedum plugs.

Roof drains from zurn include combination primary overflow control flow dual outlet siphonic retrofit and more which cater from educational to commercial needs. Hasn t been made retroactive yet. Other than the baffle a siphonic roof drain has the same features as a traditional roof drain including a. A siphonic roof drain looks much like a traditional roof drain.

The distinguishing feature of a siphonic roof drain is the air baffle. My complaint is that a tech that will take the time to use tie offs and fall arrest is the type of person that won t ever fall off a roof. 1 24 of 279 results for roof drains page 1 of 12. This air baffle is engineered and tested to prevent air from entering the piping system at peak flows.

Roof drains shall have strainers extending not less than 4 inches 102 mm above the surface of the roof immediately adjacent to the roof drain. To see availability for this product personlog in or get online access.