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REMOVE THIS OUTLINE GUIDE BEFORE PLACING

THE SPECIFICATION SECTION IN THE CONTRACT

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[DIVISION 15: MECHANICAL]{.underline}

SECTION 15403 - ROOF DRAINAGE

USE: Completion of the basic mechanical requirements.

**NOTES TO SPECIFIER:**

A. Options within paragraphs are identified by enclosure in brackets;
blank spaces enclosed by brackets \[\_\_\_\_\_\] provide for information
to be inserted, as appropriate, to individual projects.

B. **TO AVOID CONFLICTING REQUIREMENTS AND COSTLY MISTAKES,** the
specifier must edit (delete, substitute or add to the text). The
remaining paragraphs must be renumbered.

C. DELETE FOR FINAL COPY: Notes to the Specifier, located between lines
of asterisks; all \[brackets\], [underlining]{.underline}, **boldface**,
and *italics*, within the paragraphs; and this page. (Open Reveal Codes
\[alt F3\] to do this accurately.)

D. [To Edit "(Footer B)":]{.underline} (Corel 8). **ENTIRE FOOTER SHOULD
BE BOLDED.** Click in the footer and delete the "Project Name (ftr B)"
text and replace it with the **Name of the Project (upper and lower
case)**. Replace date with current MM/YY (WITHOUT BRACKETS).

E. The Guide Specifications are intended to be continuously reviewed and
revised. User's technical comments are appreciated. Also, other related
or similar specification that are written "from scratch" that could
benefit others, or other questions can be sent to NSTC A/E Group, ST
110, or call (303) 987-6868.

**DRAWING DATA REQUIRED:**

**REQUIRED SPEC MODIFICATIONS:**

[GENERAL NOTES]{.underline}

A. Whenever entire articles, paragraphs or subparagraphs are not
applicable, the articles, paragraphs or subparagraphs should be deleted;
when necessary, reletter or renumber articles, paragraphs or
subparagraphs.

B. THIS GUIDE IS NOT INTENDED AS A SUBSTITUTE FOR READING THE ENTIRE
SECTION.

[TECHNICAL NOTES]{.underline}

A. 1.1A: Select or add applicable systems.

B. 1.1C: Select or add applicable specification sections. Do not list
specification sections from Division 15.

C. 4.1 and 4.2: When a \"lump sum\" Contract is used, DELETE the title
PART 4: MEASUREMENT AND PAYMENT, and both articles from this section.
Measurement and payment will be addressed in Part 4 of Section 01010.

**REVISIONS OF THIS SECTION:**

CSI format, editorial changes: 12/01

Metric:

Technical Update: 10/85

SECTION 15403

MECHANICAL ROOF DRAINAGE

[PART 1: GENERAL]{.underline}

1.1 SUMMARY:

A. Seciton Includes: Furnishing and installing inlets, connections,
piping, hangers, supports, and other necessary accessories to provide a
complete and usable roof drainage system.

1.2 SUBMITTALS:

A. Piping: The Contractor shall submit for approval the drain and piping
system he intends to install in the building.

B. Pipe Hangers: The Contractor shall submit for approval the pipe
hangers and fastening systems he intends to use to install the piping
system.

1.3 REFERENCES:

A. Drawings: C‑1, A‑2, A‑3, A‑4, and A‑5.

B. Federal Specifications:

A‑A‑1192 Commercial Item Description, Hanger, Pipe

L‑P‑320 B Pipe and Fittings, Plastic, PVC, Drain, Waste, and Vent

WW‑P‑401 E Pipe and Pipe Fittings, Cast Iron, Soil

L‑P‑322 B Pipe and Fittings, Plastic, ABS, Drain, Waste, and Vent

L‑P‑001221 A Pipe and Fittings, Plastic, Rigid, Styrene Rubber, Drain
and Sewer

L‑P‑00315 D Pipe and Tubing, Nonmetallic (Plastic)

C. American Society for Testing and Materials:

ASTM F 708‑81 Design and Installation of Rigid Pipe Hangers

ASTM F 74‑82 Cast Iron Soil Pipe and Fittings

[PART 2: PRODUCTS]{.underline}

2.1 MATERIALS:

A. Roof Drain Inlets: Roof drain inlets shall be of a type to conform
with the roofing system. The inlet shall be designed by the manufacturer
for use with single ply roofing membrane without use of sealants except
at mating surfaces. There shall be no gaps or voids that require filling
with sealants. The Contractor shall submit a mock‑up or whatever other
drawings or literature the Contracting Officer deems appropriate to
determining the suitability of the inlet. The inlet shall be compatible
with the drain piping system used and shall conform to the Federal
Specification for the type of material it is made from.

B. Piping, Fittings, and Couplings: Piping may be plastic or cast‑iron
except for the five inch riser which must be cast iron. The piping shall
be joined with compatible fittings with joints that may be easily
disconnected or cleanout plugs at least every 100 feet along the pipe.
The piping shall be installed according to the sizes shown on the
drawings. The piping and fittings shall meet Federal Specifications
L‑P‑320B, L‑P‑322B, L‑P‑001221A, or W‑W‑P‑401E, depending on the type of
piping used.

C. Piping Hangers: The piping shall be supported at ten foot minimum
intervals with pipe hangers approved by the Contracting Officer. The
hangers shall include the pipe support, the connecting pipe to the roof
structure and clamps or other fasteners to connect the hanger to the
roof structure. The connection method shall be approved by the
Contracting Officer. Pipe hangers shall conform to Federal Specification
A‑A‑1192.

[PART 3: EXECUTION]{.underline}

3.1 INSTALLATION:

A. Requirements: The Contractor shall install the piping system as shown
on the drawings unless otherwise approved by the Contracting Officer.
The Contractor shall insure that the pipe runs drain freely and do not
interfere with other equipment or systems installed in the building.
Should a conflict occur, the Contractor shall be responsible for
designing and modifying conflicting systems at no additional cost to the
Government. The piping shall be pitched a minimum of 1/8‑inch per foot.

3.2 TESTING:

A. Hydrostatic Testing: The Contractor shall simulate a flow blockage of
the system at the dry well. The entire system shall be filled with water
to the point of overflow on the roof and shall remain in this condition
for 24 hours. If any leaks develop, the test shall be continued or
repeated until it is leak‑free for 24 hours. The Contractor shall be
responsible for cleaning up any leakage during testing and repairing to
the original condition any building parts damaged by leakage. The
Contractor shall notify the Contracting Officer 24 hours prior to
beginning the hydrostatic test.

[PART 4: MEASUREMENT AND PAYMENT]{.underline}

4.1 METHOD OF MEASUREMENT:

A. ab Units: The work described in this section will not be measured for
payment.

4.2 BASIS OF PAYMENT:

A. Payment: No direct payment for the work described under this section
will be made. Contractor shall include consideration for this item in
the bid price for other items of the Contract.

END OF SECTION