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Preconstructíom Meeting Agenda
!Íestqate Vil-l agre Mixed Use
5/8/20L8 Pennit num ber 8LD20161538
s/L4/20L8
Froject Team Information
MiLton Thompson /City Of Edmonds Bui Idíng DeveJ.opment
425-754- 6345 Emai.l: milton . thompsonGedmondswa .90v
not rcresent - An thony Jansen / Henbart tLC.
206-290-0958 Emaíl: anthonviGhenbart . com
Sandro Kodama / Quantum Consult ing Engineers
206/957 / 3907 Iïmai.l: SKodamaG <nrantumce . com
Mrrv.rrlr Crrrea / W-G- C].ark Constmct'ion CO.
206-909- 0071 Ema.íI: rcruseGwgclark. com
Tri rton Ma s Test neers
425-7 42- 9360 EmaiL JedgsaleJl_@
425-7 45-1304 Em.ail: cloudspirt3G I. com
not present - Addíson steel-
253-47 4-0711 EmaíI:
,o
s¿. l8 9
Project Name I Location :
Meeting Date:
First Pour Date:
Owner's Representative
Building Inspector*
Nøme/ CompanA
Phone:
Na.me/ CompenA:
Phone:
Structural Engineer¡
Name/ CompanA:
Ph.one:
General Contractor*
Name/ CompanA:
Phone:
S¡lecíal Inspectorr.
Name/ CornpaftA:
Ph.one:
PT Supplier
Name/ CotnparTA:
Phone:
Rebar Supptrier
Name/ Con'LpanL!:
Phone:
Concrete Smpplier
Narne/ Carnpa"nA .' not present - Miles Sand and Gravel
Plt.ar¿e:
FT Flacer
Name/ CompÇLnA:
Phone:
Rebar Flaeer
Name/ Compan.!!:
Ph.one:
Concrete Placer
.Name/ CompanA:
Phone:
Conerete Físlísher
Name/ CornpcrnA:
Ph,one:
*Attendance is rec¡uired
253-833-3705 ]irna.i.l.
Carmona Carmona Const,ructíon I.LC
25-309-2243 ¡ jcarnonaßcarmona-construction . com
Jaun Carmona / Carmona Construction LLC
425-309-2243 E mca9arJffrona G carmona - const ruct ion . com
Jaun Cazmona / Carmona Construction LLC
425-309-2243 Em.ct rmonaG carmona- construct ion . com
Jaun Carmona / Carmona Construction LLC
425-309-2243 ß carmona- construct ion . com
Submittals
The following submittals shall be reviewed, approved, ancl on-site prior to placing
concrete for post-tension beams and/or slabs:
x Coucrete Mix lJesign i¡ Slab Penetration & In-Slab Conduit l-ayout
tx Rebar Shop DrawinS4s i¡¡ Stressing Pocket Bonding Agen.t & Grout Data
X Frl Shop Drawings rx Embeciclecl Items
O Forrnwork Shol: Drawings ,_ Deferreci Submittals (I-Iolc.l Down Anchors,
or System Information ^ Ilr-Slab Duct Systems, etc.)
General FT ltems
L| Four Statístics
Expected Number of pours: 3
Nr-rmber of Levels: _?
'llpical Slab Thicl<nesses: 9"_& L2.
l,argest Pour: l!3_ C.y. 11,689 S.F.
Typical Pour: !9L C.V. 11, ?os S.F.
2f Concrete Mix
The concrete mix shail be approved by the Structural Engineer (BOR), ancL
shall be as follows:
Mix design #- will be used. #156000
Mix is continuously approved: @N
The maximum aggregate size is 3/4"- inches.
The minimum. clearance or spacing is _- inches.
The rraximum allowed slump is 6" inches.
The minimum slump for use with PT is 4 inches.
Design concrete strengt h is 5000 psi at 28 days
Strength for stressing is 3500 psi at 3 days.
NOTtr: The maximum slump for the rnix may not be exceeded, even if the
drawings or specifications allow a higher sltimp. Under no circumstances sha11
the maximum slump allowed be the average slump expected.
3| Concrete Sampling
Tests shall be taken at the point of placement whenever possible.
4l Rejection Procedures
Concrete not in conformance with the mix designs or other stated
requirements shall be rejected. Rejection procedure shall be:
I'laves Testina 1 inspector to notify lilGC s uperintendent
That he has rejected the Load. The supplier will be notified
and the ].oad(s) sent back.
5l PT Samples
Sample pieces of PT cable approximately 6 feet long are to be delivered with
every shipment of cable to the job site. Samples shall be from the same batch
as the strands with which they were sent. These samples are to be tagged
and held in the testing laboratory along with the mill certifications.
6l Stressing Equipment
Well calibrated, properly maintained. equipment is critical to reliably stressing
PT cables.
V/ill 2 sets of stressing equipment be kept on site?@n
Wili matching ram and gauge calibrations be supplied?
A 3rd back up ram wilJ. also be on site @N
NOTE: Extra ecluipment may be useful in cases of equipment malfunction or
tolerance problems.
7f Structural Observation
Structural obsen¡ation by a representative of the trOR is strongly encouraged
The planned structural observation schedule includes:
- Observation of PT with the inspector prior to the first pour,@fv
- Pre-pour observation of any subsequent placements with
significant differences from the first: yl@
- Observation of PT for 3 __ total pours. City, EOR, cc
- Observation report will l¡e written and submitted to
8| Mechanical/Electrieal/Plumbing Coordination
The contractor shall ensure that placement of nonstructural systems is
coordinated with the placernent of reinforcement.
9| Unusual Conditions
Please note any conditions that make the PT for this project unusual or
different from typical project completed in this area:
PT Beams or Walls Drop beams at L2 mid sectíon and S!ü waIl
Corrosion-Resisl.ant Sys tems: N/e
Large or Numerous Deck Openings :1 stairwell / 2 eLevators
Stressing Accessibility From deck shoring
In-Slab Ducting Sys tem: N/A
Other Conditions: N/a
Items Reviewed Prior to Each FT Deck pour
1) Overpour
Check vertical element for or¡erpours. Overpour$ are iocations where vertical
sections have been poured higher than per plans such that they extend
vertically in the slabs or beams. Concrete u'alls and columns shall not extend
more than t/z inch into the bottom of beams, slabs, or clrop caps. If slop joints
are used at the top of a wall, no overpour is acceptable.
2f Formwork
Formwork shall be stal¡le, carnbered if required, clean, and properly
supported to carry the weight of all materials and consl.ruction loaciing.
Owner
3f Construction Joints
All construction joints shall be inspected for any required keyways and added
rebar per the structural drawings.
4l Stud Rails
The size, length, spacing, and number of studs and the thickness, length, and
wiclth of the bottom plate shall be reviewed to verify compliance with the
structural drawings. The number, placing, and positioning of the stud rail
shall aiso be reviewed to verify compliance with the structural drawings.
5l PT Support
All PT cables shall be supported by rebar, on chairs, or on continuous slal:
boisters at a maximum spacing of 4 feet on. center. All cables shall l:e
securely tied to these supports to ensure final position after concrete
placement. Back-up bars are required at all anchor locations per the
stt-t-tctural drawings and the PT shop clrawings. I-{airpins are requirect at
locations where horieontal curvature ol the cable is severe as defined in the
structural drawings.
6l PT Placement
PT Cables shall be installed and piaced to the allowable tolerances as
indicated on the structural drawings. Slab tendon tolerance shall be
+l- L/8" inches for the vertical profile as shown on the PT shop cirawings.
The special inspector shall review a.ll cable count, spacings, profiies, and
anchorages prior to placing concrete. All stressing end anchors and pocket
formers shall be firmly connected to the edge form. Grommets shall be weli
greased.
7l PT Clearance
A minimum clearance of 3" inches (3" is typical) shali be verifìed lrom PT
cables to the edges of openings or sleeves. Sleeves rttay not be used near
anchors.
8l PT Encapsulation
For encapsulated systems as shown on the structural drawings, all PT sysfsrn
components shall be enclosed in a watertight assembly. Because PII cables
under stress corrode much faster than typical steel, this assembly is critical
to providing a high level of durability. A1l components of the systems shall be
firmly attached to the anchors. Transulucent sleeves shall be completely
fìlled with grease. Cuts or tears in the cable sheathing s.hall be tapecl with a
spirâ"I lü/rap. No bare cable may be exposed. The inspector shall issue a
report verifying that these conditions have been satisfied for each pour.
9| Rebar
All rebar shall be installed ancl placed within allowable tolerances as
indicated in the structural drawings and per ACI 318. The special inspector
shall review all rebar sized, spacings. clearances, and laps prior to pouring.
No wet setting of rebar is permitted.
10f Unexpected Pour Interruptions
The contractor shall have a contingency plan for the creation of construction
joints to aliow for the unexpected interruption of a pour due to pump faiiure,
concrete supply interruption, heavy rains, etc. This plan should be discussed
with the EOR in advance, ancl materials for aclclitional ke¡rways and
reinforcing should l¡e available on site.
lll 4 Hour ltrlaiting Period
A 4 hour minimum time between the special inspector's approval of
reinforcement and placing of the concrete shall be observed. The purpose of
the waiting period is to assure that work is complete, inspected, and approvecl
prior to the start of the pour. Bxception: The city inspector may make an
exception to the 4 hour minimum rule for a minor item provided the concrete
is never placed at any point on the deck until the inspector has completed the
final inspection and has approved all mild steel and PT cable placement in
writing. No other workers may be on the deck during this final inspection.
Violations may result in a stop-work order.
Items Reviewed Duríng Each pT Deck pour
1| Special Inspection During the pour
Special inspection shall be provided continnously through out the pour. At
a miuimtlm, one special inspector shall obser-ve the placement of concrete
on the decl< and one inspector shali meet the concrete trucks to verifii batch
tickets and take test cylinders at the point of delivery.
2) Pour ltrlatch
The contractor shall designate an individual to be on pour watch and
accompany the special inspector to correct any PT or other reinforcement
that is displaced during the pour. This individual may not have other duties
that will conflict with the pour watch.
3f Test Cylínders
The city requires a minimum of 3 laboratory cured cylinclers for every 150
cubic yards of concrete placed. Of those, one is to be tested at 7 days and
trvo at 28 days. in total, the special inspector shali take .- total test
cylinders for verifying the concrete strength. These shali be as follows:
3 at 3 days (for stressing - must be fìeld cured)
1 at 7 days
_3 at 28 days
at 56 davs
at 90 ¿"u*
It may be helpful to take one additional cylinder to hold in case of problems
with other cylinders. Other testing issues to consider:
Will maturity testing be used? Y/@
Are 4xB cyiinders acceptablef @N
May all the cylinders be fielcl-cnred? Y ,@
Field cured cylinders mu.st be placed on the deck or in a thermocouple box
connected to the deck and protectecl in such a way as to assure that they
benefit from the deck's heat of hlzd¡¿¡i6r.. Under no circumstances may lab
cured cylinders be used in place of field cured cylinders for determining the
strength of the deck for stressing purposes.
4f Air Entrainment and Slump
Air content as specifìed in the drawings is air content at the point of
placement. Target slump as specified in the mix design shall be the slump
allowed at the point of placement. If the concrete is pumped, the concrete
supplier shall coordinate with the contractor to provide the proper allowance
for air loss and slump changes due to pumping to ensure that air content
and slump will be as specified. Concrete with excessive slumps will not be
piaced.
5) Adding Water
No water shall be added to the concrete at the site unless the suppJier has
withheld an equal or greater amount from the total water shown on the
approved mix design. Bach batch ticket shall clearly show how much water,
if any, may be added. The person responsiirle for ordering the concrete ancl
requesting that permissible amounts of added water be listed on the batch
ticket is Jorqte Carmona The ticket shall be provided to the inspector
who rryill observe the addition of any water and log it in the inspection
report.
6| Superplaticizer
A superplasticizer may be added at the site after the concrete has been
successfully tested for sluml:. A cluality-con.trol representative of the
concrete supplier shoulcl be on site to establish the dosage for the inítial
loads. Superplasticizer shall not be used in conjunction with air
entrainment unless the potential air ioss has been accounted for by the
supplier.
7) Concrete Placement
Place concrete per the requirements of ACI 30i, taking any neÇessary
precautions for hot or cold weather conditions if required. Do not dislocate
rebar, post-tensioning cables, or other reinforcement while placing concrete.
Special precautions may be necessary if concrete is being placed with a'bucket due to the surge at the discharge point. or if hoses are being dragged
across the deck.
8) No lllet Setting
All rebar and post-tension placement shoulci l:e completed within the area of
the pour before the pour begins. No irlacing ol rebar, post-tensioning,
inserts, sleeves, conduit, dorvels, anchor bolts, etc., shall be allowed after
the inspector has given the final approval to pour.
9f Consolidation
Consolidation, particularly around the PT anchors, is critical. It is difficult
to segregate PT concrete mixes with a vibrator, so additional vibration
should be clone if there âre any doubts about aclequate consolidation.
Anchors have failed due to inadequate consolidation. Besides requiring
repair, these failures involve high forces and flying concrete ancl can be
extremely dangerous. Disturbing the concrete around the PT anchors after it
has been placed and consolidated is prohibited.
1O) Evaporative Retarder
Foliow curing procedures as specified in the structural ctrawings or
specifications. Good curing is one of the most important strategies in
creating quality concrete. If curing with a spray-applied curing compound,
apply the product immediately after slab finishing. On slabs with a broom
finish or other roughened finish, apply two coats in opposite directions. See
drawings or specifications for additional curing information.
Items Reviewed After Each PT Deck Pour
1| Stressing Preparation
Clean out any slurry or concrete from the anchors to allow proper seating of
the wedges. Clean the tendon tails of grease with a cloth or other means in
orcter to accept the paint that the inspector will use for measuring the
elongation.
2| Concrete Stressing Strength
concrete strength shal.l be a minimum of 3500 psi for stressing.
3f Stressing
The contractor shall follow the stressing procedures given on the structural
drawings and the PT shop drawings. Stressing involves extremeiy high forces
and failure to follow proper procedures may cause serious injury. Stressing
shall consist of stressíng one cable, then stopping while the stressing foreman
and the special inspector both independently measure the elongation. If the
elongation as determined by the special inspector is within tole::ance, tirey
may repeat this procedure for a second cable. If the second cable is also
within tolerance, they may repeat the procedure for a thírd cable. If the third
cable is also within tolerance, it is acceptable for the stressing crew to
proceed slightly ahead of the special inspector. This procedure shali be
repeated as often as is deemed necessary by the special inspector. The
special inspector shall observe al1 stressing crew work simultaneously,
muitiple special inspectors are required. Measured elongation tolerances
shali be:
7o/o of the calculated value unless noted: 7%
For short pulls, are tolerances of '/+" acceptable? @fV
In cases where the actual elongation falls outside of this range, do not
proceed. Contact the BOR and the PT supplier to determine the problem
before continuing. Stressing shall not continue until the BOR approves the
resumption of stressing. Note that special inspector measures elongations
and gar-rge readings, but does not operate the stressing equipment.
4| Elongation Reports
Once stressing is completed, the inspector shall fax {or em.ail) the final
stressing report to the EOR fbr review and approval as soon as possible. The
tendon tails may not be cut off until approval is receivecl.
5f Cutting and Capping Tendon,llails
Cutting and finishing of the tendon tails shall be witnessed by the special
inspector. Tlre watertight cap shatl be applied immecliately to the anchor to
ensure that the cable, rvhich was dried cLuring the cutting process, remains
dry' Finishing of the stressing end shall be verifiecl by the inspector.
6f Stressing Elockouts
Stressing blockouts shall be patched within one week of receiving approval to
cut the tendon tails. Before patching, the concrete in the blockouts shall be
kept clean aud free of rust inhibitors or otirer materials whích may interfere
with the bond of the grout patch.
7! Stripping Forms
Unless noted otherwise on the structural drawings, slab and beam formwork
may be strippecl after the stressing report has been approved. Verify the
reshoring schedule with the form work supplier before loading the newly
poured deck with formwork.
8f Soffit Curiug
When required by the structural drar,vings or specifications, apply a spray-
applied curing compound to the bottom of the slal¡ and beams after removal
of the forms. Thís limits drying on the underside of the structure after the
concrete is exposed and improves the quality of curing.
9! Closure Strips
Closure strips may require that forms remain in place on each side of the
closure until the strip has been poured and the concrete in it has reachecl
75o/o of its design strength. Closure strips for this project shall be poured no
sooner than 28_ days after the slab on both sides has been poured and
stressecl.
10) CuttÍng, Coring, and Drilling
The contractor shall take precautions when cutting, coring, drilling, or
shooting into PT slabs ancl beams to avoid damage to the reinforcing. Cables
and rebar shall be located and the infrirmation submitt.ed to the trOR for
review. Work may not begin until the BOR has approvecl the specifrc location
where work is to be done.