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CITQOF SAN BERNARDIO - REQUEO' FOR COUNCIL AC'LDN
ROGER G. HARDGRAVE
REc'n -An ,I;.r1gineer's Estimate of Cost;
StIbjlfer.MIN.OrfHl Improvement Act Project:
1985 JAM -9 AM 9:o.r~nge Show Lane between
~' St. and Arrowhead Ave.
From:
Public Works/Engineering
Dept:
1-2-85
Date:
Synopsis of Previous Council action:
11-11-83 Your Honorable Body authorized the City Engineer and City
Clerk to proceed with this project.
Recommended motion:
That the Engineer's estimate of cost relative to the improvement of
Orange Show Lane between "E" Street and Arrowhead Avenue under the
provisions of the Municipal Improvement Act of 1911 be filed.
cc: John Matzer Jr., City Administrator
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Supporting data attached:
Yes
Ward:
5026
3
Contact person:
Verne Nadeau
Phone:
FUNDING REQUIREMENTS:
Amount:
None
Source: To be pai d by Contractor or
his Assignee (1911 Act Bonds)
Finance:
Council Notes:
1
Agenda Item N~
75-0262
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CI,Q OF SAN BERNARDIQ) - REQUEOr FOR COUNCIL AC~N
STAFF REPORT
Regarding the improvements of Orange Show Lane between "E" Street
and Arrowhead Avenue by the construction of curbs, 9utters, paving,
sidewalks, street lights and drainage facilities in accordance with
Plan No. 6502, the costs are estimated as follows:
Incidental Expenses at:
$233,012
$ 29,099
1 33,375
$295,486
Construction Cost at:
Relocation of Water Lines at:
TOTAL COST AT:
This information is provided for you pursuant to Section 5130 of the
Streets and Highway Code. No action is required by your Honorable
Body.
The reason for the length of time between this action and the
Authorization to Proceed is that many rights of way and rights of
entry were necessary to obtain before we could proceed.
75.0264 ·
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- REQUEO" FO~ eCOliUCIL ACTON
ClOt OF SAN BERNARDlQ)
From:
ROGER G. HAR[)GRAVE, Director of Feasibility Report on Expan-
Public Works/City Engi~'D.-ADM,"~iM*f:. sion of Council Offices.
Publ ic Works/Engineerin'. DEe 34 AM 7; 48
Oept:
Date: December 26, 1984
Synopsis of Previous Council action:
11-5-84 -- City Engineer was instructed to perform a feasibility
study on the expansion of the Council offices on the
Mezzanine floor of City Hall.
Recommended motion:
That the Feasibility Report by the City Engineer, on the proposed
expansion of the Common Council office area,a be accepted and
filed.
cc: John Matzer Jr., City Administrator
Wayne Overstreet, Supt. of Public Buildings
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Contact person: David Trietsch
Phone:
5125
Supporting llata attached:
Staff Report
Ward:
FUNOING REQUIREMENTS:
Amount:
N/A
Sou rce:
Finance:
Council Notes:
75.0262
Agenda Item No
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1
CI..9 OF SAN BERNARDIQ - REQU~ FOR COUNCIL AC\;bN
STAFF REPORT
GENERAL
Structurally, San Bernardino City Hall consists of a combination of
steel beams, concrete beams and reinforced concrete floor slab
anchored to eighteen reinforced concrete columns. Floors #2 and
#4 through #6 are all of similar design with reinforced concrete
beams and slabs forming the platform. Floor #3 differs slightly in
that there is a stairwell opening connecting it to Floor #2.
The Mezzanine floor, which contains the Council offices, differs
greatly from the floors above it due to the fact that it is not a
"full expanse" as the other floors are. Thi s feature allows the
Council Chambers and the entry foyer to both be open to a two-story
height. This was accomplished by cantilevered construction of the
Mezanine "lobby" area directly North of the elevators, which
overlook the foyer, and the "reception" area which overlooks the
Council Chambers. A cantilever is a beam (or slab) which is built
in such a way that one end or edge is unsupported.
Due to this difference, construction of the Mezzanine floor
consists of reinforced concrete slab over steel "I" beam girders.
PROPOSED OFFICE EXPANSION
The expansion of the Council offices is proposed to be constructed
in two phases:
Phase I consists of spanning the area between the Mezzanine lobby
area and the existing conference room to provide additional office
space and conference room space.
Phase II would be the extension of the reception area Westerly into
the space above the Counci 1 Chambers.
PHASE I
Expansion of the Council conference room could be accomplished by
constructing a header beam in the North-south direction at the
Easterly edge of the expansion with floor joists running West from
the header to the existing wall to the West.
The major concern with this proposal is how to accomplish a
connection at the Southerly edge of the expansion. The existing
"Lobby" area directly North of the elevators is a cantilevered
configuration and, as such, was desi9ned to support its own weight
(dead load) plus a reasonable amount of additional weight due to
furniture, pedestrian traffic and the like (live load). Connecting
to this slab would add more dead and live load ,and could possibly
over load the design.
75-0264
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Due to the possible prohlem with connection at the Southerly end,
additional support columns may be required in the foyer area.
Approximate cost for Phase I would be $200 per square foot for 250
square feet, or $50,000.00.
PHASE II.
Expansion of the reception area will require a forty foot span
across the Council Chambers. This is possible as a free-span (no
intermediate supports) if constructed between two of the existing
major vertical columns. The obvious choice in columns would only
allow an expansion of approximately four feet to the West. Any
expansion beyond this point would be hampered by the same concerns
that arose in Phase I, that is, the connecting points on the North
and South are not designed to withstand additional loading. Mid-
span supports would he required.
Even if the span was proposed between two col umns, mid-span
supports would probably be required due to the beam deflection of
the span. These supports would be in the form of columns extending
down to the Council Chambers floor and additional columns directly
beneath the Council Chambers floor in the basement. Approximate
cost for Phase II Ilould be $112,000.00 based on $200.00 per square
foot for 560 square feet.
SUMMARY
Please note that the above analysis is based upon a rudimentary
knowledge of structural design. Neither the Public Works Depart-
ment or the Building and Safety Department presently have staff
legally able to analyze and make design recommendations on the
proposed expansion. The Professional Engineer's Act (Chapter 7 of
Division 3 of the State of California Business and Professions
Code) requires that this work be performed by a Professional Civil
Engineer with an additional Structural Engineer authority.
CONCLUSIONS
Phase I of this expansion appears to be both physically and
economically feasable. Phase II, however, can be accomplished only
with major structural additions and with disruption of the "day to
day" operations of the basement, first floor and mezzanine, and is
considered unfeasible.
If the Mayor and Council wish to proceed with Phase I of the
proposed expansion, it is recommended that $5,000.00 be allocated
to cover architectural fees and the Director of Public Works/City
Engineer be authorized to issue request for proposals to selected
Architects.
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