HomeMy WebLinkAboutAgenda Report - October 17, 1990 (36)'rRE MY COUNCIL COUNCIL MEETING DATE NO.
THE CITY MAIiAM S OFFICE I OCTOBER 17, 1990
SPECIFICATIONS AND ADVERTISEMENT FOR BIDS - STEEL LIGHT STANDARDS
RECOMMENDED ACTION: That the City Council approve the specifications
and authorize advertisement for bids for the purchase of 47 steel light
standards.
BACKGROUND INFORMATION: The Electric Utility Depart+nent has issued
preliminary work orders for the replacement of 39 steel light poles.
Recent inspections and tests have revealed existence of metal fatigue
in some of the older standards in the street light system. As a
result, the Department is moving forward to replace those poles with
new,--- gahvan• zect steel standards.
`:The additional eight poles would be placed in inventory to provide
immediate replacements for other' poles found, in the future, to be
deficient.
The estimated cost of this purchase is $20,500, with funding available
in the Public Works/Street Light Maintenance account.
The bid opening is scheduled for Tuesday, October 30, 1990.
cc: Electric Utility Director
Assistant Electric Utility Director
Street Superintendent
Electrical Engineer
It 4 x,
Z E. Harris
rchasing Officer
TQUIPMENT SPECIFICATIONS
STEEL STANDARDS
GENERAL
Equipment furnished shall be tested and approved, according to procedures
set forth by I.E.S. specifications, and shall meet the minimum standards
set forth in the ASTM and EEI-NEMA latest revisions.
STEEL STANDARDS
A. Standard:
Standard shall be hot -dipped galvanized steel per. ASTM A-123. The
standard shall be anchor -base. type. The shaft shall be round and
tapering. Base shall be welded. `Standard shall be in compliance with
ASTM A-570 and made of 10 gauge steel for minimum yield strength` of
33,000 PSI' before forming or. 11 gauge steel for minimum yield strength
of 48,000 PSI before forming. Luminaire mounting height to be 30'
nominal
The _standard .shallbe .equipped_with._4",,x 6" minimum handhole located in
front, under .arm, I and. l' to 21, above. base Handhole to be freeof
sharp edges or ,.points. Stainless steel socket flush head cap screws
(Allen -type scre,,rs);shali be supplied with each handhole cover. Anchor
base shall be:- of ASTM A-36' steel plate and shall be designed to
withstand the full bending moment of the shaft. Steel castings shall
conform to ASTM A -27 -Grade 65035. A ground lug accepting #6 AWG copper
conductor shall be provided- with easy access through the handhole
only. The standard shall be similar in design to the following:
Valmont Cat. No. Bclt Circle (Range)
Item 1: DS50-7.5A270-8S 10.5" (10"-11")
Item 2: DS50-6.6A270-8S 9.5" ( 9"-10")
B. Arm:
Each standard shall be supplied with one A' long arm. The upsweep
.(rise) height of the arm shall be 3' nominal. Arm shall have raintight
fitting and be bolted type.
C. Bolt Covers:
Bolt covers shall be supplied with each standard.
D. Bolt Circle Range:
Bolt circles shall accept ranges as listed below:
Item 1:
Item 2:
Rnit rirrlo
10.5"
9.5"
Bolt Circle
Range (Diameter)
10"-11"
911-1011 "-10"
S-1
S#1_IGHTG.1/TXTU.01D i0/09/90