HomeMy WebLinkAbout26 BANNER POLES 02-22-94..AGE N
DATE:
FEBRUARY 22, 1994
NO. 26
2-22-94
inter. Com
TO:
WILLIAM A. HUSTON, CITY MANAGER
FROM: PUBLIC WORKS DEPARTMENT/ENGINEERING DIVISION
'SUBJECT: :SAt~'~R POLES ON ~,laZN s'."R:~:E'z'
RECOMMENDATION
Pleasure of the City Council.
FISCAL IMPACT . .
It is estimated that the cost to remove and replace the Main Street
banner poles is $20,000.00
BACKGROUND' ,:;.: , - ~.. .' i,: ~
On Thursday, December 23, 1993 extremely heavy winds buffeted the
Southern .California area. During ·those winds the ·concrete
marbelite banner pole located on the south side of Main Street just
east of Prospect Avenue toppled onto the street. At the time of
the incident-., a banner'.--~as--in place and ~hung'..over' Main street.
between the two concrete marbelite poles. Fortunately, no one was
injured in this occurrence. Since utilization of banners on Main
Street has become a very popular and useful means to publicize City
related events to the public, the Engineering Division has been
requested to provide a report for City Council consideration
concerning replacement of the banner pole system at this location.
DISCUSSION
It is believed that the toppling of one of the concrete marbelite
banner poles on December 23, 1993 occurred due to the excessive
wind loading exerted on the pole by a banner being hung across Main
Street which caught the full force, of the wind. The banner acted
in much the same way as a large sail might act by catching, a wind.
Unfortunately, the wind. force in ·this situation exceeded the
ability of the southerly concrete marbelite pole to withstand this
excessive loading and caused it to fracture and fall to the ground.
In ' reviewing the options for replacement of the poles, the
Engineering 'Division has concluded that galvanized steel poles
-should be utilized for the replacement instead of concrete
marbelite poles, which have previously been utilized. It is felt
that galvanized steel poles would provide a greater tensile
.... strength in comparison to concrete marbelite poles and would be
better able to withstand wind loads caused by different types and
sizes of banners even if guidelines for their pole attachment were
not explicitly followed.
It is estimated that the total cost to remove the old
'poles/foundations and install new galvanized steel poles (designed
for increased wind loading) with new concrete foundations in the
same general vicinity along Main street is $20,00.0, which has not
been budgeted for in the current City budget. If funds are
budgeted in the future for this replacement work, it will require
approximately nine months to fully implement, which includes time
for design, time for the formal competitive Public Works bidding
process, and time for the construction phase which includes a long
lead time (industry standard ranges from 12 to 16 weeks) for the
contractor to obtain the new replacement poles.
If the City Council desires to proceed with the Main Street banner
pole replacement in the near future then two options for
implementation are apparent: ~
1)
Approve a supplemental budget appropriation in the amount
of $20,000 for the present FY ~93/94 budget; or
2)
Consider allocating $20,000 for the banner pole
replacement as part of the FY ~94/95 Capital Improvement
Program review process.
Robert S. Ledendecker
Director of Public Works/
City Engineer
Dana R. Kasdan
Engineering Services Manager
RSL :I)RK: k[b: ~o[e