ST8402-CS 880909T
GINN, INC.
September 9, 1988
Mr. David M. Snyder, P.E.
L.H. Lacy Company
10888 Shady Trail
P.O. Box 541297
Dallas, Texas 75354-1297
Re:
CONSULTIN(
Denton Tap Road Improvements from Sandy Lake Road to Denton
Creek, Coppell, Texas.
Dear Mr. Snyder:
This letter is in response to your request for .clarification,
copy attached, concerning the intent of the Equalizer Pipe Detail
shown on sheet 26 of 56. The detail is intended to show the
relationship of the equalizer pipes to the precast box culverts
and the 2000 psi concrete backfill required to fill the 6 inch
space between the double precast box culverts for their entire
length. Therefore in answer to your inquiry, the limits of the
2000 psi concrete backfill are from the outside bottom to the
outside top of the box culverts, from Sta. 185+04 to Sta. 197+32,
excluding the Transition Box at Sta. 191+79.00 and the actual
spaces occupied by the equalizer pipes.
Other evidence indicating the nature of the material to be placed
between the double precast box culverts is to be found on page
659 of the Texas State Department of Highways and Public
Transportation 1982 Standard Specifications For Construction of
Highways, Streets and Bridges. I have attached a copy of this
page highlighted to indicate the particular phrase which
indicates that a special material shall be placed in between the
barrels as shown on the plans. I have also included a blue line
print of the Texas Highway Department Bridge Division standard
detail sheet for Precast Box Concrete Culverts, PC-3, Rev. 6-80.
This detail sheet indicates a 6 inch width of Cement Stabilized
Backfill between the barrels of multiple unit placement of
precast concrete box culverts. Both of the above items are
included in the Contract by reference as shown on the attached
copies of pages from the Contract as listed below:
1. Section 07000 - Standard Specifications, Page 1.
2. Section 07000 - Standard Specifications, Page 2.
3. Section 07500 - Special Provisions, Page 3.
4. Section 07500 - Special Provisions, Page 4.
5. Section 07500 - Special Provisions, Page 30.
17103 Preston Road · Suite 100 · kB 118 · Dallas, Texas 75248 · Phone 214/248-4900
Based on the above we contend that it is standard practice to
fill the space between the precast concrete box culverts with a
Cement Stabilized Backfill unless shown otherwise on the plans;
and that it is shown on the plans otherwise, meaning 2000 psi
concrete. If there had been reasonable doubts as to our
intentions in this matter, there should have been inquiries made
prior to bidding. Our records contain no instances of this item
being questioned by any of the bidders. Therefor, you are to
place the 2000 psi concrete as a subsidiary item between the
precast concrete box culverts, within the limits mentioned above.
If you have further questions in this matter please feel free to
call me.
Sincerely,
John C. Karlsruher, P.E.
project Engineer
enclosures
cc:
H. Wayne Ginn, P.E.
Russell Doyle, P.E.
Randy Fleming
JOHN~
=.~:..UHLI,.E,", PIPE DETAIL SHEET
WLJ,..,L,.) L f I.::;E ,'.4 CLAR i ~
L. H. =mE.' ...... ," ,,"-~ ,' ........ iCATir]N_ OF i'HE '.-m ....
SHOWN ON SHEE'F 2(-3 OF 56 OF THE F:'LANS FOR THE GANDY L. AKE TO DENTON CREEK
PROJEC-F (JOB 379). THE DtSPUT'ED POINT iS: WHA'F ARE filE LIMITS OF' THE
:,.3~2}i:~:) PS;[ CONCRETE BACKFILl_? I_. H. LACY"S F-'OSI'FION. IS AS FOLLOWS:
I)
, ., E DE-i'RI[
i'HE EEE;!UA!_iZEF4 ='"'~::'- ..... Y ....... - .... ONLY A"F 'THE c-m ux.'r=~.-p F"[PE
THERE IS NOT ANY AF'F'ARENT EVIDENCE ELSEWHERE IN ]'HE PLANS &
P~i CONCRETE BACKFILL IS REQUIRED AT
SPECiFiCAI"IONS THA"F 'THE 2000 '-~ -
Ar4Y Q'I"I.4ER S"FATiONS THAN ;D THE EQUAI_iZEF~ PIPES.
IF THE INTENT OF THE EQUALIZER PIPE DETAIL IS TO BE TYPICAL ONLY A"F THE
EQUALIZFR PIPE L. H. LACY RE(D. tJESTS THAT A REASONABLE- LIMIT OUTSIDE OF THE
PIPE DIAMETER BE ESTABLISHED (2 1-O 4 FEET) FOR THE 2000 PSI CONCRETE
BACKFILL. IF ]"HE INTI.:_'I'.4T []F THE Eg!UALIZER PIPE DETAIL WAS TO BE TYPICAL FOR
2000 PSI CONCRETE BACKFILL THE WHOLE LENGTH OF THE DOUBLE-BARREL BOX
CULVEIRT l"F IS L,, I-t. LACY'S CONTENTION 'T'HAT 'l'i4E REQUIREMENT OF 'THAT CONCRETE
BACKFILL .iS NOT EVIDENT BY THE DETAIL IN QUESTION, NOR IS IT EVfDEN'F FROM
l-t_;-..~N~ OR SPECIF'I(]A'FION: AND THE i:~'.F_Q. LiIREMENT OF
ANY OTI-II'ZR DE-:]'All. .... L, Ti::. ON "FHE .... "'-':
_Z ,:..) ,(:, c. :: :~: :;: 2 ;:: :',i C ;':;: iE'7.---.': 2< .,"A C :-::. ::*: :E L .... !" i~ E .,J i...t t3 L % ,_ .Z :'q L:; ","',-i E ~:-:7 ;*.-t f--'"' D C U E': L LE --.E: ~:*.~::~ i:::, i.Z L_ 3 L] X C :2 b V E F;',"?
,.,.. .... -, .... i:t,. --.,.
~OtJLD NE.'C[::!g!~II"A"FF_ A ~F4F~Nb.-.-u,.DER
RESPECTFULL'¢,
DAVII) Ft. SNYDER: P.E.
:'.,~r~ ~,=~",- M~-~h. IAGER
b H. Lacy Company
General Contractors
214/357-0146
"Quality Construction for over 65 Years"
10888 Shady Trail
P.O. Box 541297
Dallas, Texas 75354-1297
Z
0
NGLE MAT
'LACEMENT
~INTERIOR L FACE
,DOUBLE MAT
PL,ACEMENT
rcumferenliol bor moy be
ided in either lhe tongue
roove or bolh/
B°''F
!
-INTERIOR WALL OR
SLAB FACE
rEEL SUPPORT
DETAIL
ny Bars F as necessary may
o end of boxlo supporl
nanufacture. Bors may be
'o clear slope on groove lip
etoJl. Allernotively the steel
)rted by bar extensions
~rs F.
GENERAL NOTES:
Cement Slabilized Backfill shall be considered subsidiary fo the unit
price bid for Concrete Box.
All welding to be done by qualified welder.
Addilionol splices in reinforcing steel not shown hereon, must be sub-
mitted to the Bridge Division for approval prior to fabrication.
Grade 60 Bars or Wire Fabric may be used in place of Grade 40 Steel
by supplying 82% of the oreo of steel per linear fool shown in Ihe Tables
for Bars A,B,C and D.
Longiludinal steel shall have et least os much area os BarsFand
shall be spaced of lB" c.c. maximum.
These designs ore adequate for HS 20 live loading and any fill depth
~rom'2'-O" to the maximum shown in the lhe tobies.
In lieu of furnishing the designs shown on this deloil the contractor may
use designs from eilher Slondard PC-I or ASTM C789, Table I. For boxes
reinforced with wire fabric the minimum cover shall be three times lhe wire
diameter but not less than. one nch Placing of reinforcmenl shall otherwise
conform to specification "Reinforcing Steel~'
TEXAS HIGHWAY DEPARTMENT
BRIDGE DIVISION
PRECAST CONCRETE
BOX CULVERTS
PC 3
T
SECTION 07000 - STANDARD SPECIFICATIONS
PART 1: GENERAL
1.1
GENERAL:
A. All specifications and special provisions applicable
to this project are identified as follows:
STANDARD SPECIFICATIONS: The 1982 Edition of the
Texas State 'Department of Highways and Public
Transportation Standard Specifications for Construction
of Highways, Streets and Bridges as adopted by the
State Department of Highways and Public
Transportation, September 1, 1982, Part II, Construction
Details.
B. The following items are specifically hereby included:
ITEM NO.
DESCRIPTION
100
104
110
120
131
132
140
160
164
166
168
210
249
260
264
3O0
302
310
340
360
400
401
420
421
427
430
432
439
440
441
450
452
460
462
Preparing Right-of-Way
Removing Old Concrete
Roadway Excavation
Channel Excavation
Borrow (delivered)
Embankment
Overhaul
Furnishing and Placing Topsoil
Seeding for Erosion Control (Hydro-Mulching)
Fertilizer
Sprinkle Irrigation
Rolling (Flat Wheel)
Flexible Base (Delivered)
Lime Treatment for Materials in Place
Hydrated Lime & Lime Slurry
Asphalt, Oils, Emulsions
Aggregate for Surface Treatment
Prime Coat
Hot Mix Asphaltic Concrete Pavement (Cl.A)
Concrete Pavement (Water Cement Ratio)
Structural Excavation
Excavation and Backfill for Sewers
Concrete Structures
Concrete for Structures
Surface Finishes for Concrete
Extending Concrete Structures
Rock Riprap
Concrete Overlay
Reinforcing Steel
Steel Structures
Railing
Removing Railing
Corrugated Metal Pipe
Reinforced Concrete Box Culverts
Sec. 07000
1
464
470
471
475
479
481
496
502
504
5O8
512
520
522
530
582
618
662
666
672
674
676
Reinforced Concrete Pipe Culverts
Manholes and Inlets
Frames, Grates, Rings & Covers
Headwalls, Wingwalls, Inlets & Manholes
Adjusting Manholes & Inlets
PVC Pipe
Removing Old Structures
Barricades, Signs and Traffic Handling
Field office
Constructing Detours
Portable Concrete Traffic Barrier
Weighing & Measuring Equipment
Ready-Mix Plants
Concrete Curb, Gutter, Curb & Gutter,
Sidewalks & Driveways
Water Mains & Drains
Conduit and Pullboxes
Construction Pavement Markings
Thermoplastic Pavement Markings
Jiggle Bar Tile
Pavement Markings
Traffic Buttons
C. In addition to the above Standard Specifications, the
August 28, 1986 Edition of the North Central Texas Council of
Governments Standard Specifications for Public Works
Construction, Part II, Materials, and Part III, Construction
Methods, where not in conflict with the Highway Department
Standards, shall be applicable to this project. If a
conflict should occur, the Highway Department Specifications
shall govern, unless stated otherwise.
Sec. 07000
2
T
SECTION 07500 - SPECIAL PROVISIONS
PART 1: GENERAL
1.1 GENERAL:
ao
Bo
Ce
The following Special Provisions shall govern
and take precedence over the aforementioned
Standard Specifications enumerated herein whenever
they are in conflict.
Mention herein or indication on the drawings of
items, materials, operations or methods,
requires that the Contractor provide and/or
install each item mentioned or indicated of
quality or subject to qualification noted; perform
according to conditions stated each operation
prescribed; and provide all necessary labor,
equipment, supplies and incidentals.
Requirements of the General Conditions, Special
Conditions and Addenda, if issued, shall apply as if
herein written.
De
Separation of these specifications into items and
sections is for convenience only and is not intended
to establish limits of work.
ITEM NO.
100
104
110
120
131
132
133
140
160
164
166
168
210
249
260
264
310
340
360
400
401
420
421
427
DESCRIPTION
Preparing Right-of-Way
Removing Old Concrete
Roadway Excavation
Channel Excavation
Borrow (delivered)
Embankment
Remove and Replace Unstable Material
Overhaul
Furnishing and Placing Topsoil
Seeding for Erosion Control (Hydro-Mulching)
Fertilizer
Sprinkle Irrigation
Rolling (Flat Wheel)
Flexible Base (Delivered)
Lime Treatment for Materials in Place
Hydrated Lime & Lime Slurry
Prime Coat
Hot Mix Asphaltic Concrete Pavement (Cl.A)
Concrete Pavement (Water Cement Ratio)
Structural Excavation
Excavation and Backfill for Sewers
Concrete Structures
Concrete for Structures
'Surface Finishes for Concrete
Sec. 07500
3
430
432
439
440
441
450
452
460
462
464
470
471
475
496
502
504
508
512
530
582
611
618
662
666
672
674
676
Extending Concrete Structures
Rock Riprap
Concrete Overlay
Reinforcing Steel ~
Steel Structures
Railing
Removing Railing
Corrugated Metal Pipe
Reinforced Concrete Box Culverts
Reinforced Concrete Pipe Culverts
Manholes & Inlets
Frames, Grates, Rings and Covers
Headwalls, Wingwalls, Inlets & Manholes
Removing Old Structures
Barricades, Signs and Traffic Handling
Field Office
Constructing Detours
Portable Concrete Traffic Barrier
Pavers
Water Mains & Drains
Bridge Electrical
Conduit and Pullboxes
Construction Pavement Markings
Thermoplastic Pavement Marking
Jiggle Bar Tile
Pavement Markers
Traffic Buttons
NOTE:
The following Special Provisions are provided for
clarification or reference where required and shall govern if
applicable to the project, or a specific portion of the
project.
Sec. 07500
4
Article 460.9 MEASUREMENT and Article 460.10 PAYMENT are
hereby deleted and replaced with the following:
There shall be no separate measurement and payment of this
item, but it shall be considered subsidiary to Pay Item 100,
"Prepare Right-Of-Way."
SPECIAL PROVISION TO ITEM 462 -- CONCRETE BOX CULVERTS
Article 462.1 DESCRIPTION. Delete the last sentence of the
first paragraph and replace it with the following:
Ail Concrete Box Culverts shall be precast.
Add the following to the second paragraph:
The precast box culverts shall be designed according to the
latest revised ASTM C789 or ASTM C850 (for less than 2'
cover) specifications depending on the cover conditions.
When actual cover conditions vary for a particular section of
box of the same size to where both cover conditions exist,
box sections conforming to ASTM C850 shall be required.
Article 462.8 CONSTRUCTION METHODS.
and insert the following:
Delete the first paragraph
Excavation and backfill shall be in accordance with the
requirements of the Special Provisions .to Item 401,
,,Excavation and Backfill for Sewers."
Article 462.9 MEASUREMENT. Delete paragraph three' and four.
Article 462.10 PAYMENT. Delete paragraphs one through five in
their entirety and replace with the following:
The unit price bid per linear foot for the various sizes and
types of "Concrete Box Culvert," shall be full compensation
in place, for constructing, or furnishing and transporting
sections; the preparation and shaping of bed, including
bedding; jointing of sections; all excavation and backfill;
for connections to existing structures; concrete, reinforcing
steel, all sprinkling and compaction of material;
constructing all cofferdams; all dewatering; all soundings;
pumps, drills; all other items of materials, labor, and
equipment, tools, and incidentals necessary to complete the
work in accordance with the plans and these specifications.
When sections are laid on a skew, full compensation for
cutting the ends when required by the plans shall be included
in the unit price bid per linear foot, measured in a
accordance with Article 462.9.
Sec. 07500
3O