616Siphons

Siphons

Description

616.01This work consists of the construction of invert siphons per these specifications and in

conformity with the lines, grades and details shown on the plans or established.

Materials

616.02Concrete Pipe. Concrete pipe shall conform to the requirements of subsection 706.02

except that pipe and gaskets shall be of a type that will ensure a watertight structure. Joints shall be self-centering. Gaskets shall meet the requirements of subsection 705.03.

616.03Trash Guards. Steel shall conform to the requirements of subsection 712.06 and to the

details shown on the plans. Trash guards shall be given one shop coat of primer and two field coats of aluminum paint in conformity with Section 509.

616.04Drain Valves and Valve Boxes. Drain valves shall be gate type with flanged iron body,

brass trim and brass fittings. Size will be as designated on the plans. Valve boxes shall be the adjustable cast iron type with a 5 1/2-inch minimum inside diameter. Drain valves and valve boxes shall be approved before use.

616.05Drainpipe. Pipe for the drain shall conform to Section 605. Concrete shall conform to

The pipe attached to the siphon and leading to the drain valve may be non-perforated corrugated steel pipe conforming to AASHTO M 36 or of standard galvanized pipe conforming to the requirements of ASTM A53 (Schedule 40). This pipe, when attached to steel siphon pipe, shall be bituminous dipped along with the siphon pipe. Flanges for attaching the drain valve may be galvanized or asphalt dipped.

Any damaged spelter shall be repaired per subsection 707.09 both inside and outside the pipe.

Construction Requirements

616.06Siphon pipe including drains shall be installed per the requirements of Section 603

Siphons shall show no leakage when filled with water and allowed to stand full for 24 hours. This test shall be performed before backfilling. Method of Measurement

616.07Siphon pipe, of the designated type, will not be measured but will be the net length of

pipe called for on the plans, except when field changes are ordered or when there are errors on the plans. In case of exceptions, the quantity to be measured shall be the actual net length of conduit measured along the bottom centerline of the installed pipe. Trash guards, drain valves and valve boxes will be measured by the number installed and accepted. Drainpipe will be measured and paid for per Section 605. Concrete will be measured and paid for per Section 601. Reinforcing steel will be measured and paid for per Section 602. Structure excavation and structure backfill will be measured and paid for per Section 206. Drain valves shall include the pipe for connecting the valve to the siphon, together with all necessary fittings and gaskets used.

616.08

Basis of Payment

616.08The accepted quantities will be paid for at the contract unit price for each of the

pay items listed below that appear in the bid schedule. Payment will be made under:

Pay Item Pay Unit _____Inch Concrete Siphon Pipe Linear Foot _____Inch Trash Guard Each _____Inch Valve and Valve Box Each

618.01 Section 20 7