WA9601-AG 980916 AGENDA REQUES'~;~ ORM
CITY COUNCIL MEETING: September 8, 1998 8, 1998 ITEM #
ITEM CAPTION:
Consider approval of Change Order #3 for the Wagon Wheel Ranch Elevated Storage Tank Project
#WA 96-01 in the amount of $47,600 to Landmark Structures, Inc.; and authorizing the Mayor to sign.
APPROVED
CITY r/ ~
DATE _C~Q~U~C~IL
TITLR: Director o£ R~gineering/Public ~orks
~ee a~ached memo,
BUDGET AMT. $ AMT. EST. $ +/- BUD:$
FINANCIAL COMMENTS:
Funds for this change order have been allocated in the l~ater/Sewer tIP accounts. ~~
The total cost of this project including the change still remains under the or~
budget.
DIR. INITIALS: \~ FIN. REVIEVV~.~ CITY MANAGER REVIEW:
Agenda Request Form - Revised 3/98 Document Name: #eng2
MEMORANDUM
FROM THE
DEPARTMENT OF ENGINEERING
To: Mayor and City Council
From: Ken Griffin, P.E., Director of Engineering and Public Works ~
RE: Consider approval of Change Order #3 for the Wagon Wheel Ranch Elevated Storage
Tank Project #WA 96-01 in the amount of $47,600 to Landmark Structures, Inc.; and
authorizing the Mayor to sign.
Date: September 8, 1998
During the initial design of the elevated storage tank project, provisions were made to provide
additional storage inside the base of the elevated tank to accommodate storage required by the Utility
Division such as meter storage, surplus supplies for projects, etc. Drive-in doors were placed on both
ends of the elevated tank to off-load materials from vehicles. Also, a metal grated floor about 40 % of
the ground floor size was provided for additional storage. A one-half ton crane was provided to place
items on the second level.
During construction the contractor, Landmark Structures, Inc., has proposed to eliminate the partial
grated second floor and one-half ton crane and replace it with a full concrete floor and one-ton crane.
The crane is necessary to lift heavy objects to the second floor for out-of-way storage. There would
be a hatched door proposed through the concrete floor to access the second floor. As the project was
originally bid we had approximately 1000 square feet of storage on the grated second floor. With this
change we will have approximately 3000 square feet of storage on the second floor, an increase of
about 2000 square feet.
As of this date, I am unsure of how the additional footage would be utilized, however, storage is at a
premium within the City. Our current elevated storage tank on Southwestern Blvd. is being utilized
for storage for various departments such as the Police Department's confiscated and found property,
surplus furniture, auction items, etc. and is currently maxed out on storage capacity. Because this is a
one time opportunity to create additional storage inside the elevated storage tank for future storage of
supplies, meters, etc., staff recommends approval of Change Order #3 in the amount of $47,600 and
will be available to answer any questions at the Council meeting.
"CITY OF COPPELL ENGINEERING - EXCELLENCE BY DESIGN"
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CITY OF COPPELL, TEXAS
WAGON WHEEL RANCH ELEVATED STORAGE TANK
Project No. WA-96-01
Bid No. Q0198-03
CHANGE ORDER NO. 3
A. INTENT OF CHANGE ORDER
The intent of this change order is to modify the provisions of the contract entered into between the City of
Coppell, Texas and Landmark Structures, lnc., 1665 Harmon Road, Fort.Worth, Texas 76177, for
construction of the Wagon Wheel Ranch Elevated Storage Tank, dated March 10, 1998.
B. DESCRIPTION OF CHANGE
This change order covers the extra work required to substitute a free span complete storage floor consisting of
a concrete deck and wall mounted l-ton jib crane with electric hoist in place of the partial galvanized steel
storage floor and supports and ½-ton capacity free standing jib crane and hoist.
C. EFFECT OF CHANGE ON CONTRACT AMOUNT
This change order will have the following effect on the cost of this project:
Item Previous~ Quantity I Revised I Unit Amount
No. Description Quantity This C.O. Quantity Unit Price of Change
] G .2 V:-ton Free Standing Jib Crane and Hoist I 0 0 L.S. ($9, 100) ($9, 100.00)
] G .3 Galvanized Steel Partial Storage Floor I 0 0 L.S. ($13,000) ($13,000.00)
and Supports
IG.2 l-ton Wall Mount Jib Crane and Electric 0 I I L.S. $2,000 $2,000.00
Hoist
IG.3 Free Span Concrete Complete Storage 0 I I L.S. $67,700 $67,700.00
Floor
Total: ~ $47,600.00
Original Contract Amount 2,256,717.00
Change Order No. I 230,635.70
Change Order No. 2 4,000.00
Change Order No. 3 47,600.00
Revised Contract Amount $2,538,952.70
wagon Wheel Ranch ElevatedStorage Tank (C.O #3) Page I of 2 (9/9/98)
j :%clerical\coppell\96-149Xspecsxzo-3 .doe
D. EFFECT OF CHANGE ON CONTRACT TIME
It is hereby agreed that work associated with Change Order No. 3, will add no additional working days to this
project.
Original Contract Time 460 Calendar days
Time, Change Order No. 1 0 Calendar days
Time, Change Order No. 2 0 Calendar days
Time, Change Order No. 3 0 Calendar days
Revised Contract Time 460 Calendar days
E. AGREEMENT
By the signatures below, duly authorized agents of the City of Coppeil, Texas and Landmark Structures, Inc.,
do hereby agree to append this Change Order No. 3 to the original contract between themselves, dated
March 10, 1998.
City of Coppeil, TexafiD - ~/~ Landmark Structures, Inc.
By: By:
B'i~gon Wheel Ranch Elevated Storage Tank (C. O. #3) Page 2 of 2 (9/9/98)
j\clerical\coppell\96-149Xspecs%co-3doc
-,-- /12" FIll ~ /.-~/~h Opening
;~ ! __ ..__j 3' x T Mandoor below
180° Jib Crane -
See I~wg. S13-J ~. 12'wide x 14' Truck Doer below
1. System - Composite concrete slab/steel Ikx~r deck. Total slab depth- 5-'1/2'.
- Simply supportecl non compo~.,, structural s~eel beam support.
2. Design Standards - SDI- specification ~ c~'nmenJary
- AISC- allowable st~'sss ~[eslgn
3. Deslgn Uve Load - 125 pal
4. MELterlal SpeclflCa.tlOn - Refer to tietall drawing. s.
5. F'tn~h - galv&nlze all exposed metal deck ~nd l'ram[ng
- steel trowel c~ncreta slab llnlah
Rav~ D,, ' INTERMEDIATE FLOOR
LAKE GENEVA - # 512 PLAN / GENERAL DESIGN
~ 08/96
LANDMARK S13 -A
~ ~ Tower Stalr Framlng
2 · FILl/12' Overflow Opening Frame
19'- 1 - 1/4" ~ : -'
~ n $ 'b 'etween beams. s 11.56° i
-. ................... -~, ................ ~- .' ~
BM - W24 x 68
NOTES:
1. See Dwg. S13- F for beam fabrication details.
2. DImensions and angles shown are to the (~ of Inserts
~tev. Date INTERMEDIATE FLOOR
FLOWER MOUND - #515 STRUCTURAL FRAMING
Dam 06 196Dwn.
,. L A N D M A R K o~. s~3-s2
~ 1/2' dla.'Expanslon Anchors @ 16" c/c II
' ~ 7" Sealant
.:~.~,!:,;" 1/2' Expansion Joint (Install w/1/2' Cap Strip)
': ': ..~. ~ '.= 1/4" Expansion Joint
' """ ~ Call Closure ( shown ) or Girder Fi er ( beam connection locations )
..... '~,
~-Metaj Deck .
i . Felt paper bond breaker between deck and angle
--~ x 1/4 angle '
PERIMETER ANGLE DETAIL
~_ 6~ ,70
'~2,,~;.-..,! ,~ Lift 3
.,., .
.... .:.
,*-; 1I:3:';""'""
· ~,.',~. i ,__._ __ Beam Hanger Insert Plate w/10 pc's. 3/4' EC-2FW
""""!
· "
:,?.. :~ .,----- -- Beam Hanger Plate w/10 pc's. 3/4' A325; SC bolts
· . .~
!!,~ E,~,,. 6~.3o (Bottom of ~n,ert P~ate >
i," :" ', ! t ~D Elev. 676.80 ( ~ ,p of Floor )
,2~,,.-~ ..... ,
,: :.'~'.L,.'.
..,...,.
· .,. oo
.'~': :' .' ~.' ii ° o BM 1 / aM 2 'h'>
:.: :,:.,~ '. ~i; ~ ,--.--Beam Shea' ConnectJon Plate, Fasten w/12 pc's, 3/4' A32S-SC bolts
-41/4=gap} '
BEAM CONNECTION DETAIL
Bey. Date INTERMEDIATE FLOOR
FLOWER MOUND - # 515 CONNECTION DETAIL
· ' Date 06 / 96 ~ CTR
LANDMARK