cold shuts, and blow holes that may impair their strength or
appearance. Give exposed surfaces a smooth finish with sharp
well-defined lines and arises. Provide necessary rabbets, lugs,
and brackets wherever necessary for fitting and support.
**************************************************************************
NOTE: Delete the text below when painting of cast
iron items is not in accordance with local station
practice.
**************************************************************************
b.
Field painting: After installation, clean cast-iron frames,
covers, gratings, and steps not buried in concrete to bare metal
of mortar, rust, grease, dirt, and other deleterious materials and
apply a coat of bituminous paint. Do not paint surfaces subject
to abrasion.
3.1.6
Sewage Absorption Trench Construction
Grade pipe lines uniformly downward to the outlet. Lay perforated pipe
with the perforations downward. Lay drain tile with 6 mm 1/4 inch open
joints. Cover open joints of drain tile with the cover material specified
so that it extends not less than 1.75 rad 100 degrees on each side of the
vertical center line of the tile. Wire covering in place.
3.1.7
Installations of Wye Branches
Cutting into piping for connections shall not be done except in special
approved cases. When the connecting pipe cannot be adequately supported on
undisturbed earth or tamped backfill, the pipe shall be encased in concrete
backfill or supported on a concrete cradle as directed. Concrete required
because of conditions resulting from faulty construction methods or
negligence by the Contractor shall be installed at no additional cost to
the Government. The installation of wye branches in an existing sewer
shall be made by a method which does not damage the integrity of the
existing sewer. One acceptable method consists of removing one pipe
section, breaking off the upper half of the bell of the next lower section
and half of the running bell of wye section. After placing the new
section, it shall be rotated so that the broken half of the bell will be at
the bottom. The two joints shall then be made with joint packing and
cement mortar.
3.2
FIELD QUALITY CONTROL
3.2.1
Field Tests and Inspections
The Contracting Officer will conduct field inspections and witness field
tests specified in this section. The Contractor shall perform field tests
and provide labor, equipment, and incidentals required for testing[, except
that water and electric power needed for field tests will be furnished as
set forth in Section [_____]]. Be able to produce evidence, when required,
that each item of work has been constructed in accordance with the drawings
and specifications.
3.2.2
Tests for Nonpressure Lines
Check each straight run of pipeline for gross deficiencies by holding a
light in a manhole; it shall show a practically full circle of light
through the pipeline when viewed from the adjoining end of line. When
SECTION 02531
Page 36
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