HomeMy WebLinkAboutDRAWING #4018_AS BUILT_201 INTERNATIONAL DR1. PRESTRESSING STEEL
Prestressing steel shall be seven -wire stress - relieved
strand for prestressed concrete manufactured in accor-
dance with ASTM A416 and free from corrosion having a
guaranteed minimum ultimate tensil•strength of 270 ksi.
Noninal diameter 1/2
Area 0.153 sq. in.
Modulus of Elasticity 28,'00 ksi
Ultimate strength 41.3 kips
Max. temporary force 33.0 kips (see Ram Calibra
Anchoring force 28.9 kips Lion chart)
Final effective force
Strand is coated with a rust preventive grease and en-
closed in an extruded plastic slippage sheathing. Torn
or damaged sheathing shall be patched before concrete
pouring. Small tears or sheath free sections of cable
less than 6 in, in length need not be patched.
i 2. ANCHORAGES'
I
I All anchoring hardware shall meet the minimum requirements
II set forth in A.C.I. Standard Building Code Requirements
for Reinforced Concrete (ACI- 318 -71, Chapter 18) or Pre
-
'stressed Concrete Institute "PCI" Standard Building Code
I for Prestressed Concrete.
P.T.S.I. SK-1 anchor casting with reusable rouraet shall
be used at all stressina ends where anchorage must be
recessed in concrete in order to receive required concrete
VI cover. If possible dip grommets in form oil for easy removal.
IIII. P.T.S.I. stressing end anchorage.T -H with slotted
fbearing plate or SK -1 anchor with split grommet shall be
used at construction joints where tendons will be stressed
intermediately and at other. locations where stressing and
anchorages will receive concrete cover by a reinforced con -
4 crete pour, wall pour or a closure pour.
P.T.S.I. SK -1 anchor casting with shop pre- seated wedges
ishall be used for all fixed -end anchorages.
3. TENDON FABRICATION
Tendons will be fabricated with sufficient length beyond
II edge form to allow stressing. A minimum length of twelve
inches of each stressing end is .required.
Tendons that are stressed from one end only shall have
I fixed -end anchorages attached to one end prior to shipment.
Tendons that are stressed intermediately at a construction
+I joint shall have an anchorage placed at a predetermined
distance along the tendon prior to shipment.
I' Tendons shall be clearly identified by color code as called
for on the placing drawings for easy placement.
Each tendon shipment shall be accompanied by a tendon fabri-
cation order indicating the number of tendons, their length, j
') �I color code and total number of anchorages, wedges and grommets I!
shipped.
Purchaser shall properly unload tendons upon arrival. Use of
a nylon sling is recommended to prevent damage to sheathing.
Purchaser shall satisfactorily protect tendons at the job-
site from corrosion prior to placement. Sufficient protec-
tion shall also be provided for exposed prestressing steel
at the ends of members to prevent deterioration.
4. PLACING OF TEIiDONS AND ANCHORAGES
Locate the centerlines of the bundles at the edge forms as
shown nn the tendon layout drawings. Locate and mark the
anchorage centerlines. At stressing ends the contractor shall
drill 1" diameter holes in the edge forms: at intermediate
stressing joihts, notched or split forms shall be provided
to facilitate tendon placing.
At stressing ends nail the anchorages with grommets securely
in place against the edge forms using rink shank nails.
Lay bottom perimeter bars along the edges of the slab and
the intermediate stressing joints.
Place support bars and tendons according to strand layout
drawings. For two -way slabs follow placing sequence drawings
if any, or details showing the placing sequence in critical
areas.
Tendon placing procedures are as follows:
+' - Uncoil tendons starting at the dead ends.
-At stressing ends remove wrapping inside the edge form
flush with back side of casting, the length from inside
face of edge form to strand ends must be at least i2 i
-At intermediate stressing joints remove just enough
wrapping to insure proper stressing; no wrapping can
__ remain in the anchorages.
-Tie dead ends as shown. I
-At stressing ends tendons through anchorages.
-At intermediate stressing joints place tendons through
edge form and nail SK -1 anchorages or slotted bearing ;
i coordinated with placement of tendons; in case of con-
flict, tendon location governs.
5. ACTUAL TENDON SEQUENCE PLACEMENT'
i For sequence slab: follow sequence numbers as described
on tendon layout sheets.
For banded slabs:
i1. Place uniform strand over centerline of column.
2. Place all bande.'. tendons.
I 3. Place remainder of all uniform tendons.
I
li For one way beam and slab:
1. Place all beam tendons.
2. Place all uniform tendons.
3. Temp - strand, if applicable, see typical section for
Ii placement.
II Lay top perimeter bars along slab edges and intermediate
stressing joints-, tie bottom and top perimeter bars to
.anchorages or tendons, 'as shown.
Chairs up support bars according to tendon profiles - riace
tendons with smooth horizontal curves.at the anchorages
( as shown. Place one chair at each intersection of a bun-
IIdle with a bar and tie chair, bar and bupole together.
Slab tendons.corssing over a m bea may tied directly
flto the top longitudinal bars of the beam if proper c.g.s.
of this slab tendons is maintained.
II At stressing ends wrap the tendon-anchorage connections with
jl'heavy duty tape to prevent, cement flow into anchorages. Con -
crete shall be placed in such a manner as not to disturb the
�ftendon prof :,len;,workmen must be cautioned against walking
on tendon or support bars. Any tendons displaced during
concrete placement must be restored to its original profile
I before concrete sets.
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6. STRESSING PROCL'. ^URE
The stressing `operatian must be under the immediate control
of a person experienced in this tupe of work; he must exer-
cise close check and rigid control of all operations. The
stressing must not commence until concrete test pylinders,
cured under obsite conditions, have been tested and indi-
cate that the concra-t-e-, as reached a minimum strength of
All sprestressing steel shall be stressed by means of hydrau-
lic jacks, c?uipped with calibrated hydraulic pressure gau-
ges. A calibration chart shall accompany each jack. If in-
consistencies between the measured elongation and the jack
gauge reading,occux, the jack -gauge -pump unit shall be
recalibrated. An agreement of within 5% shall be satisfac-
tory.
The stressing, operation proceeds as follows:
1. Remove grommets of stressing endsl check inside each
grommet hole to make arse that the,anchorages are free
from cement paste; it not,, remove paste from anchorage.
2. Insert wedges dide by side by hand into each anchorage.
3. Put a paint mark in each strand at the edge or at a
fixed distance from the edge of the slab.
4. Stress strand to 804 of ultimate capacity, i.e. 33 kips.
Tendons tl'.st are stressed from both ends need not be
stressed Cross both ends simultaniously.
5
RE USEABLE PLASTIC GROMMET
SPLIT BULKHEAD
SK -1 ANCHOR 12' MIN.
REO'D FOR STRESSING it
12' MIN. _- TAPE ALL EXPOSED STRAND
2-+ 4 (CON T) -� STRESSING ANCHORAGE
REO O FOR STRESSING I AT
(BY OTHERS)
\-L-SPLIT PLASTIC GROMMETS / RILL 1' HOLE
N 2 -�4 -
c �r I o CC T)
NAIL SK-1 ANCHOR TO BULKHEAD
(RING SHANK NAILS RECOMMENDED)
INTERMEDIATE STRESSING ANCHORAGE
(BEFORE CONCRETE POUR)
5. Seat the caJges'`using the hydraulic device built into Tau
the jacks. UNIFORM TENDONS
6. Remove the jack. SE --
DIRECTION REBAR
7. Measure final elongation. Record elongation.
Tendons stressed from one end only shall be so indicated U
on the placing drawings. Tendons that are stressed from
both ends need not be stressed from both ends simulta- O
neously if it can be shown that the wedges on the opposite d a
end are pre - seated and cause no slippage of the tendon. y
These tendons may have more elongation at one and than at , r
the opposite end. Elongation from both ends must total the
elongation shown on the placing drawings.
to
If jobsite conditions warrant, the location of the fixed ZO
end anchorage may be reversed with the location of the 71 1 1
stressing end anchorage location. - _ tu
Total elongation shall be based upon: t'
per foot of tendons length. I W
PI. . 28.9 (1) (12) 0.079 in.
)w 07.r5T-PrF7,7W Z
7. STRESSING SEQUENCE I <
m
Banded slab:
1. Stress all uniform tendons.
2. Stress all banded tendons.
ec C
one way beam and slab:
1. Stress all uniform tendons.
2. Stress all beam tendons.
3. Stress temp tendons (if applicable) .
The post- tensioning operation shall be so conducted that PLAN VIEW AT COLUMN D
accurate elongation of the prestressing steel can be
recorded and compared with computations submitted and (BANDED) -/
approved by the structural engineer.
Record shall ba kept of all jacking forces and elongations
and submitted promptly to the structural engineer.
1r- UNIFORM TENDON SUPPORT BAR
Take saiuty pr.'cdutierns na necessary: DO Ncfr permit workman UN)FOR61 REBAR rT'-�f BANDED REBAR
to stand behind jacks. while stressing tendons.
8. SEALI:iG ANCHORAGE BLOCKOUT
After stressing is completed, elongations verified and with I I BANDED TENDON
prior approval of the structural engineer, tendons shall be J
burned off within one inch (1 -) from slab edge. Coat stress- ;
ing hardware with corrosion preventive materais, leapt UNIFORM RGPPED PANEL
paint). TENDONS SECTdON C -C WHERE APPLICABLE
As soon as practical after strands have been cut off, the
contractor should drypack exposed anchorage blockouts. It
is suggested that ar, epoxy mix be used for this purpose; COLUMN
otherwise a stiff grout mixture of 2 parts cement to 1 part
sand may be-used.
9. MISCELLAI7EOUS i CE Mon on mo
e
All the equiomn,: used for handling and placing tendons Typ
must not damage tE dfateriorate the prestressing steel or CG S
the anchorages. } END SECTION (BANDED) G
Post - tensioring dra ings are intended for tendon and NaT
support bar placanentt only. See architectural and struc-
tural drawings for exact location of edge forms, openings
changes, of level and final finished concrete elevations
Or slabs and girders.
All inserts for' suspended mechanical and architectural
work must ba cast -in- place. If additional. fasteners are SEE PLAN FOR DIMENSK)NQ
required, power-driven fasteners will be permitted only
where they will not spall the concrete and not damage the
tendon contractor must locate tendons at the surface of : SUPPORT BARS s CONTINUOUS
the slaat b bp
fore fasteners. I iv g .STRANDS
All pockets and closure stripe required for anchorages must -- ;
be adequately reinforced so as not to decrease the atrength
of the structure. SK -1 ANCHOR
TENDON LEGEND
One Tendon -
_--^�-
Two Tendons
^
6.::. ....6.....n_.r. 5 _i......
a.: .-.Y l- -+
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Added Tendon
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Spacing begins 0' -. 0"
0�
Elongation
-`
Stressing Record Nos.
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6. STRESSING PROCL'. ^URE
The stressing `operatian must be under the immediate control
of a person experienced in this tupe of work; he must exer-
cise close check and rigid control of all operations. The
stressing must not commence until concrete test pylinders,
cured under obsite conditions, have been tested and indi-
cate that the concra-t-e-, as reached a minimum strength of
All sprestressing steel shall be stressed by means of hydrau-
lic jacks, c?uipped with calibrated hydraulic pressure gau-
ges. A calibration chart shall accompany each jack. If in-
consistencies between the measured elongation and the jack
gauge reading,occux, the jack -gauge -pump unit shall be
recalibrated. An agreement of within 5% shall be satisfac-
tory.
The stressing, operation proceeds as follows:
1. Remove grommets of stressing endsl check inside each
grommet hole to make arse that the,anchorages are free
from cement paste; it not,, remove paste from anchorage.
2. Insert wedges dide by side by hand into each anchorage.
3. Put a paint mark in each strand at the edge or at a
fixed distance from the edge of the slab.
4. Stress strand to 804 of ultimate capacity, i.e. 33 kips.
Tendons tl'.st are stressed from both ends need not be
stressed Cross both ends simultaniously.
5
RE USEABLE PLASTIC GROMMET
SPLIT BULKHEAD
SK -1 ANCHOR 12' MIN.
REO'D FOR STRESSING it
12' MIN. _- TAPE ALL EXPOSED STRAND
2-+ 4 (CON T) -� STRESSING ANCHORAGE
REO O FOR STRESSING I AT
(BY OTHERS)
\-L-SPLIT PLASTIC GROMMETS / RILL 1' HOLE
N 2 -�4 -
c �r I o CC T)
NAIL SK-1 ANCHOR TO BULKHEAD
(RING SHANK NAILS RECOMMENDED)
INTERMEDIATE STRESSING ANCHORAGE
(BEFORE CONCRETE POUR)
5. Seat the caJges'`using the hydraulic device built into Tau
the jacks. UNIFORM TENDONS
6. Remove the jack. SE --
DIRECTION REBAR
7. Measure final elongation. Record elongation.
Tendons stressed from one end only shall be so indicated U
on the placing drawings. Tendons that are stressed from
both ends need not be stressed from both ends simulta- O
neously if it can be shown that the wedges on the opposite d a
end are pre - seated and cause no slippage of the tendon. y
These tendons may have more elongation at one and than at , r
the opposite end. Elongation from both ends must total the
elongation shown on the placing drawings.
to
If jobsite conditions warrant, the location of the fixed ZO
end anchorage may be reversed with the location of the 71 1 1
stressing end anchorage location. - _ tu
Total elongation shall be based upon: t'
per foot of tendons length. I W
PI. . 28.9 (1) (12) 0.079 in.
)w 07.r5T-PrF7,7W Z
7. STRESSING SEQUENCE I <
m
Banded slab:
1. Stress all uniform tendons.
2. Stress all banded tendons.
ec C
one way beam and slab:
1. Stress all uniform tendons.
2. Stress all beam tendons.
3. Stress temp tendons (if applicable) .
The post- tensioning operation shall be so conducted that PLAN VIEW AT COLUMN D
accurate elongation of the prestressing steel can be
recorded and compared with computations submitted and (BANDED) -/
approved by the structural engineer.
Record shall ba kept of all jacking forces and elongations
and submitted promptly to the structural engineer.
1r- UNIFORM TENDON SUPPORT BAR
Take saiuty pr.'cdutierns na necessary: DO Ncfr permit workman UN)FOR61 REBAR rT'-�f BANDED REBAR
to stand behind jacks. while stressing tendons.
8. SEALI:iG ANCHORAGE BLOCKOUT
After stressing is completed, elongations verified and with I I BANDED TENDON
prior approval of the structural engineer, tendons shall be J
burned off within one inch (1 -) from slab edge. Coat stress- ;
ing hardware with corrosion preventive materais, leapt UNIFORM RGPPED PANEL
paint). TENDONS SECTdON C -C WHERE APPLICABLE
As soon as practical after strands have been cut off, the
contractor should drypack exposed anchorage blockouts. It
is suggested that ar, epoxy mix be used for this purpose; COLUMN
otherwise a stiff grout mixture of 2 parts cement to 1 part
sand may be-used.
9. MISCELLAI7EOUS i CE Mon on mo
e
All the equiomn,: used for handling and placing tendons Typ
must not damage tE dfateriorate the prestressing steel or CG S
the anchorages. } END SECTION (BANDED) G
Post - tensioring dra ings are intended for tendon and NaT
support bar placanentt only. See architectural and struc-
tural drawings for exact location of edge forms, openings
changes, of level and final finished concrete elevations
Or slabs and girders.
All inserts for' suspended mechanical and architectural
work must ba cast -in- place. If additional. fasteners are SEE PLAN FOR DIMENSK)NQ
required, power-driven fasteners will be permitted only
where they will not spall the concrete and not damage the
tendon contractor must locate tendons at the surface of : SUPPORT BARS s CONTINUOUS
the slaat b bp
fore fasteners. I iv g .STRANDS
All pockets and closure stripe required for anchorages must -- ;
be adequately reinforced so as not to decrease the atrength
of the structure. SK -1 ANCHOR
TENDON LEGEND
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BAR SECTION w'
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ADDED, STRAND
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46' GROMMET
460 GROMMET DETAIL E
(WHERE APPLICABLE) 1
SECTION D -D
PTSI SK -1 ANCHOR CASTING
L2 RING SHANK NAILS (RECOMMENDED)
STRESSING ANCHORAGE C
(BEFORE CONCRETE POUR) i
#3 SUPPORT BA
(SEE PLAN)
ICENTERLINE OF STRAND p
GROUP -SEE STRAND I
LAYOUT FOR SPACING
OF GROUPS
6' -0' MIN.
LENGTH OF'TRANSITION CURVE
PLAN I GROUP
SK- 1 ANCHOR-
4YaB
;ONT) -
1' -3' 1'-0'
rRAIGH MIN.
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6' TYP•
�� FOR SLAB 6 119 '
I COS 3' THICK 3 LESS
TYP.
END VIEW B -B
FLARE AT TENDON END F
FOR SLAB T' THICK d LARGER 1-
BAND
SUPPORT BAR-'
FOR LENGHT
SEE PLAN
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03 SUPPORT BAR I
SLAB BOLSTER (SB) • SEE SUPPORT PLAN FOR. CHAIR HEIGHTS
AND SUPPORT BAR LOCATIONS
TENDON SUPPORT IN SLAB
EU�on;s•- BEAM BAND
SEE CHAIRIN -3 LAN FOR SPACIN
TYP. ADDED TENDON D.E. I.B. SLAB BOLSTER '
2 O4 TIE TO THRU STRAND8 /' SEE PLAN FOR TYPE
O
TYPICAL HAIRPIN DET. FOR 3' CHAIR EACH SIDE � 3 SUPPORT BAR WITH
CURVED 'TENDON GROUP OF BEAM,. INDIVIDUAL CHAIR HEIGItT .
1,
CALLED OUT ON PLAN Li
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SLAB PROFILE DETAIL L
SEE PLAN FOR NUMBER
BAND AND SPACING OF BAND
BUNDLES
BAND SUPPORT DETAIL H
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1. g• ►d)N, TENDON
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(MAX.) L 3' CLEAR (MIN.)'
PLAN VIEW AT OPENINGS I
SEE PLAN FOR
INDIVIDUAL CH$ IP.
OR SLAB BOLSTER
HEIGHTS
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_--^�-
Two Tendons
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Four Tendons
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Five Tendons
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Dead End
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Added Tendon
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Spacing begins 0' -. 0"
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Elongation
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Stressing Record Nos.
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First Stress
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Second Stress
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ADDED, STRAND
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46' GROMMET
460 GROMMET DETAIL E
(WHERE APPLICABLE) 1
SECTION D -D
PTSI SK -1 ANCHOR CASTING
L2 RING SHANK NAILS (RECOMMENDED)
STRESSING ANCHORAGE C
(BEFORE CONCRETE POUR) i
#3 SUPPORT BA
(SEE PLAN)
ICENTERLINE OF STRAND p
GROUP -SEE STRAND I
LAYOUT FOR SPACING
OF GROUPS
6' -0' MIN.
LENGTH OF'TRANSITION CURVE
PLAN I GROUP
SK- 1 ANCHOR-
4YaB
;ONT) -
1' -3' 1'-0'
rRAIGH MIN.
� ®I
®1
6' TYP•
�� FOR SLAB 6 119 '
I COS 3' THICK 3 LESS
TYP.
END VIEW B -B
FLARE AT TENDON END F
FOR SLAB T' THICK d LARGER 1-
BAND
SUPPORT BAR-'
FOR LENGHT
SEE PLAN
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03 SUPPORT BAR I
SLAB BOLSTER (SB) • SEE SUPPORT PLAN FOR. CHAIR HEIGHTS
AND SUPPORT BAR LOCATIONS
TENDON SUPPORT IN SLAB
EU�on;s•- BEAM BAND
SEE CHAIRIN -3 LAN FOR SPACIN
TYP. ADDED TENDON D.E. I.B. SLAB BOLSTER '
2 O4 TIE TO THRU STRAND8 /' SEE PLAN FOR TYPE
O
TYPICAL HAIRPIN DET. FOR 3' CHAIR EACH SIDE � 3 SUPPORT BAR WITH
CURVED 'TENDON GROUP OF BEAM,. INDIVIDUAL CHAIR HEIGItT .
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CALLED OUT ON PLAN Li
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SLAB PROFILE DETAIL L
SEE PLAN FOR NUMBER
BAND AND SPACING OF BAND
BUNDLES
BAND SUPPORT DETAIL H
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1. g• ►d)N, TENDON
8
(MAX.) L 3' CLEAR (MIN.)'
PLAN VIEW AT OPENINGS I
SEE PLAN FOR
INDIVIDUAL CH$ IP.
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