**Construction Specification 742---Concrete Pipe Conduits and Drains**

**1. Scope**

The work shall consist of furnishing and installing concrete pipe or
concrete drain tile and the necessary fittings as shown on the drawings.

**2. Material**

Concrete culvert pipe shall meet the requirements of Section 850.01,
Concrete Pipe, of the latest edition of the Alabama Department of
Transportation Standard Specifications for Highway Construction. Pipe
class shall be as specified in Section 8.

**3. Laying and bedding**

Pipe and tile shall be laid to the line and grade shown on the drawings.
Unless otherwise specified, belled pipe shall be laid with the bells or
grooves facing upstream.

**4. Joints**

Pipe joints shall conform to the details shown on the drawings and to
the requirements of Sections 5 and 6 of this specification applicable to
the type of joint specified. Except where unsealed joints are indicated,
pipe joints shall be sound and watertight at the pressure specified.

**5. Joining tongue and groove pipe**

**Cement mortar sealed joint**

Mortar shall be as specified for bell and spigot joints. The tongue end
of the section being placed shall be covered with mortar and firmly
pressed into the groove of the laid section so that the tongue fits
snugly and truly in the groove and that mortar is squeezed out on both
the interior and exterior of the joint. Care shall be taken that no
mortar falls from the groove end during the abutting operation.
Immediately after the pipe sections have been abutted, exposed external
surface mortar shall be pressed into the joint and any excess mortar
removed. After this is done, the interior surface of the joint shall be
carefully pointed and brushed smooth and all surplus mortar removed.

**6. Curing Mortar Joints and Bands**

The external surfaces of mortar joints shall be covered with moist
earth, sand, canvas, burlap or other approved materials and shall be
kept moist for 10 days or until the pipe is backfilled.

**7. Measurement and payment**

***Method 1---***For items of work for which specific unit prices are
established in the contract, the quantity of each kind, size, and class
of pipe or tile is determined to the nearest 0.l foot by measurement of
the laid length along the invert centerline of the conduit. Payment for
each kind, size, and class of pipe or tile is made at the contract unit
price for that kind, size, and class. Such payment constitutes full
compensation for furnishing, transporting, and installing the pipe or
tile complete in place.

***Method 2---***For items of work for which specific unit prices are
established in the contract, the quantity of each kind, size, and class
of pipe or tile is determined as the sum of the nominal laying lengths
of the sections used. Payment for each kind, size, and class of pipe or
tile is determined as the sum of the nominal laying lengths of the
sections used. Payment for each kind, size, and class of pipe or tile is
made at the contract unit price for that kind, size, and class. Such
payment constitutes full compensation for furnishing, transporting, and
installing the pipe or tile complete in place.

***All methods---***The following provisions apply to all methods of
measurement and payment. Compensation for any item of work described in
the contract, but not listed in the bid schedule, is included in the
payment for the item of work to which it is made subsidiary. Such items
and the items to which they are made subsidiary are identified in
section 11 of this specification.

**8. Items of work and construction details**

Items of work to be performed in conformance with this specification and
the construction details therefore are:

[Bid Item 17, Concrete Pipe, 24in. Diameter]{.underline}

(1) This item shall consist of furnishing and installing the reinforced
    concrete pipe conduit and appurtenances as shown on the drawings.

(2) The pipe shall be class III.

(3) A concrete collar shall be installed at the junction of the existing
    pipe and new pipe if the pipe joints are not compatible and a water
    tight joint cannot be achieved. Use of the collar will be approved
    by the Contracting Officer\'s Representative. The concrete collar
    shall be constructed in accordance with the details shown on the
    drawings. Concrete shall be furnished in accordance with
    Construction Specification 732, Concrete.

(4) Measurement and payment shall be by Method