HomeMy WebLinkAbout57 Wheeler Ave #D - 2025 - Medical Office Deferred concrete submittalMATERIALS:
LOCTITE Tyfo® SCH-41 Uni-directional Carbon Fiber System
5/8" Dia x 19" Length LOCTITE Tyfo® SCH Anchors
LOCTITE Tyfo® S epoxy
10-16 Mesh, Coarse, Washed, Kiln-dried Sand
Thickened LOCTITE Tyfo® S Epoxy: LOCTITE Tyfo® S Epoxy thickened with Cab-o-sil TS-720 (or Fyfe-approved
inert filler) to provide a smooth base for applying the fiber-epoxy resin laminate. The amount of Cab-o-sil TS-720
added shall not exceed 7% by weight and is field adjusted based on application and temperature.
Sheet Set
Sheet 1 Title sheet & General Notes
Sheet 2 Topside FRP - Underground Plan
Sheet 3 Underside FRP - Underground Plan
Sheet 4 Typical Details
Sheet 5 Typical Details
Sheet 6 Typical Anchor Details at Obstructions
GENERAL NOTES:
SURFACE PREPARATION
1.Ensure all structural cracks, spalls, damaged and unsound concrete are repaired with conventional methods
to create a flat or slightly convex surface (by others).
2.Surfaces shall be prepared for bonding by means of abrasive blasting or grinding to remove existing laitance
and expose aggregate [minimum ICRI CSP-3 concrete surface profile].
3.The surface to receive the composite shall be free from fins, sharp edges and protrusions that will cause
voids behind the installed composite or that, in the opinion of the Engineer of Record, will damage the fibers.
4.For drilling anchor holes or creating penetrations, scanning steel rebar / tendons shall be done (by others) to
avoid damaging steel reinforcement.
5.The surfaces to receive the composite shall have no free moisture at the time of application.
6.All contact surfaces shall be cleaned by hand, vacuum or compressed air.
INSTALLATION
1.Verify ambient and concrete temperatures. No work shall proceed if the temperature of the concrete surface
is less than 50°F or greater than 100°F or as specified on the epoxy component labels. Substrate shall be at
least 5°F above the dew point.
2.Fabric shall be completely saturated prior to application to contact surface. Both the epoxy resin and fabric
shall be measured accurately, combined, and applied uniformly at the rates shown on the product data
sheets.
3.All cutting of fabrics, mixing of epoxy and combination thereof shall take place in a protected area away from
critical structure functions and any electrical equipment.
4.Clearly mark exact hole locations for drilling FRP anchors. Clearly mark exact FRP placement over the
roughened surface to prevent waviness or out-of-straightness deviations.
5.Drill holes for fiber anchors with a rotary hammer drill and a carbide bit. Grind edges around anchor holes for
smooth transitions. Scanning steel rebar / tendons shall be done (by others) to avoid damaging steel
reinforcement.
6.Clean anchor holes with a steel bristle pipe brush equal to or greater than the concrete bit size (perform 5
insertions minimum).
7.Remove dust and debris created by anchor hole drilling and grinding with HEPA filtration vacuum equipment.
8.Repeat the previous two anchor installation/cleaning steps until all holes are created.
9.Protect areas adjacent to surfaces that will receive composite (e.g. prevent epoxy staining or contamination).
10.Apply one prime coat of epoxy resin to the substrate (2 mil Typ.). Allow sufficient time for primer to become
tacky to the touch or to soak into the substrate and create a damp surface with no standing liquid.
GENERAL NOTE: The details in this shop drawing set are based on the project drawings and any verified site
conditions prior to installation. Any site conditions that are not shown in these shop drawings which would impede
or alter the installation of the LOCTITE® Tyfo® Systems as detailed, shall be immediately communicated to FYFE
and/or the Engineer-of-Record. Do not proceed with any work at these locations until revised detailing is
approved.
DISCLAIMER: FYFE did not analyze the capacity of the existing structural members or its condition.
The details and notes shown on these drawings are only relevant to and only intend for the specific LOCTITE®
Tyfo® products called out. In no event should these drawings or any details or notes herein be used without the
specific LOCTITE® Tyfo® products called out. Any use or reliance on these drawings or any details or notes
herein without the specific LOCTITE® Tyfo® products is strictly prohibited. Should other products be used on the
project, these stamped drawings shall be considered null and void and FYFE its employees, directors, and
affiliates assume no liability with respect to such use. These stamped drawings do not in any way infer
equivalency of any product(s) to that of the LOCTITE® Tyfo® FRP systems shown. These stamped drawings do
not imply the approval from any relevant authority having jurisdiction.
USC Keck Medicine
57 Wheeler, Arcadia, CA
Slab Strengthening Utilizing the LOCTITE® Tyfo® FRP Systems
11.Apply a uniform layer of thickened LOCTITE Tyfo® S Epoxy (15-30 mil Typ.) to prepare for bonding
composite material and to fill uneven surfaces (up to 0.5” bug holes). Ensure that out of plane deviations are
less than one-half inch per foot.
12.Apply saturated fabric to substrate by hand. Fiber waviness or skew cannot exceed one-half inch per foot.
Ensure proper orientation of the fabric.
13. Pre-saturate composite anchors by hand in a bath. Installation of dry anchors is prohibited.
14.Fill the drilled hole min. 75% volume with thickened LOCTITE Tyfo® S epoxy prior to installation.
15.Embed saturated anchor (with insertion tool) to the specified depth. Maintain tension in the anchor with the
insertion tool and splay free end of anchor as detailed.
16.Apply subsequent composite layers, continuously or spliced, until designed number of layers is achieved.
17.Using a roller or hand pressure, release or roll out entrapped air, and ensure that each individual layer is
firmly embedded and adhered to the preceding layer or substrate.
18.Finish all overlaps, seams and edges with thickened LOCTITE Tyfo® S Epoxy. Thickened LOCTITE Tyfo® S
Epoxy to extend 1-2" beyond fabric onto roughened surface.
19.At 75°F, allow a minimum cure time of 24 hours prior to the application of finishes. If after 72 hours the epoxy
is cured, the surface must be roughened by hand sanding or brush blasting, prior to finishing. Cure is a
function of the environment, and thus environmental conditions dictate the applications window.
20. Finish as specified by the structural engineer of record and owner/architect.
Key-Coat Finish (Top of slab): Immediately apply a 15-to-20mil coat of thickened LOCTITE Tyfo® S
epoxy to all exposed surfaces extending at least 1" (25mm) past all edges. Immediately broadcast
10-to-16 mesh coarse, washed, dry sand to all exposed surfaces. Immediately blow any excess sand
via a portable blower forward into the wet coating and discard any excess/loose sand. Allow installation
to cure, undisturbed for at least 48-hours prior to the application of flooring or roofing materials.
Sheet 1 of 6 Title sheet & General Notes
Revision No.Revised By Revision Date
Engineer Stamp
USC Keck Medicine
LOCTITE ® Tyfo ® FRP Systems are registered trademarks for the products of Henkel Corporation.
Email: mail-id-fyfesalesengineering@group.henkel.com
Orig. Date:Drafter:
Engineer:Rev. Date:
Dwg. No.:
2025/04/04JN
J.ALVARADO
Arcadia, CA
Slab Strengthening
6/30/25
NO EXCEPTIONS TAKEN
REVISE AND RESUBMIT
DATE
4
DavidP
4/8/2025
This submittal has been prepared by other design
professionals who are licensed and authorized to
prepare such drawings in the state the project is being
constructed. This submittal has been reviewed for
general conformance with the structural design
concept of the project and general conformance with
the structural information given in the contract
documents. Any action shown is subject to the
requirements of the plans and specifications.
BUEHLER
MAKE CORRECTIONS
NOTED: RESUBMISSION
NOT REQUIRED
BY
SEE COMMENT
SUBMITTAL REVIEW
NO EXCEPTIONS TAKEN.
MAKE CORRECTIONS AS NOTED. Resubmittal not required unless Contractor cannot comply with corrections noted. REVISE AS NOTED AND RESUBMIT. RESUBMIT PROPERLY. Submittal not reviewed for reasons noted. NOT REVIEWED. Submittal not required by Contract Documents. RECEIVED FOR CLIENT’S RECORD ONLY. Submittal not reviewed.
Gensler has reviewed this Submittal, but only for the purpose of checking for conformance with the design intent expressed in the Contract Documents. Gensler’s action on a specific item does not indicate approval of an assembly of which the item is a component, nor of an item as delivered and installed if it does not conform to the Contract Documents.
Contractor is responsible for checking for deviations between this Submittal and differing information or conditions in the Contract Documents and field conditions; for determining or substantiating the accuracy and completeness of other details such as dimensions and quantities; for substantiating instructions for installation or performance of equipment or systems designed by Contractor; for construction means, methods, techniques, schedules, sequences, procedures, and fabrication processes; for errors and omissions in Submittals; for coordination of the Work of the trades, safety precautions and performing the Work in a safe and satisfactory manner and in conformance with the Contract Documents.
If more than one submittal review stamp appears on this Submittal, the most stringent action and notations thereon apply. Signature of a submittal review stamp by Gensler or a consultant does not imply that it has reviewed work not within its professional discipline or scope of services. v1 3/2012
By: Date:
Project No:
Submittal:
21458 Tue Apr 08, 2025
07.3850.000
Fyfe Drawings - USC Keck Medicine - stamped 04.08.2
//gensler.ad/Projects/07/07.3850.000/Documentation/6/6S/250408-FRP Submittal/
Scott F Arnold
Digitally signed by Scott F ArnoldDN: E=sfarnold@gmail.com, CN=Scott F Arnold, O="FYFEFRP, LLC", SERIALNUMBER=AATL20240603352145, L=Houston, S=Texas, C=USDate: 2025.04.08 12:27:52-07'00'
5 6 7 8 910 11 12 13 14 15 16 17
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Sheet 2 of 6 Topside FRP -
Underground Plan
Revision No.Revised By Revision Date
Engineer Stamp
USC Keck Medicine
LOCTITE ® Tyfo ® FRP Systems are registered trademarks for the products of Henkel Corporation.
Email: mail-id-fyfesalesengineering@group.henkel.com
Orig. Date:Drafter:
Engineer:Rev. Date:
Dwg. No.:
2025/04/04JN
J.ALVARADO
Arcadia, CA
Slab Strengthening
N.T.S.
Topside FRP - Underground Plan1
(1) #5
(2) #5
(1) #8
(2) #5
(1) #5
(1) #5
(2) #5
(1) #5
(2) #5
(1) #8 (1) #5
(2) #5
(1) #5
(1) #8 & (1) #5
2627
28
29 23
21
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(3) LAYERS LOCTITE TYFO
SCH-41, 8" WIDE STRIPS
INSTALL (4) LAYERS,
24" TOTAL WIDTH,
PER SHEET 5
(2) LAYERS LOCTITE TYFO
SCH-41, 12" WIDE
11" TO WALL.
SEE DETAIL 8
17" TO SLAB STEP.
SEE DETAIL 7
3"
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7
SLAB STEP,
3.5" (V.I.F.)
INSTALL (3) LAYERS OF THE LOCTITE
TYFO SCH-41 SYSTEM, 24" WIDE, TO
EITHER SIDE OF THE COLUMN (AS
REQUIRED TO OBTAIN FULL
DEVELOPMENT LENGTH PER DETAIL 3).
15.5" TO SLAB STEP.
SEE DETAIL 7
(3) LAYERS LOCTITE TYFO
SCH-41, 8" WIDE STRIPS
(2) LAYERS LOCTITE TYFO
SCH-41, 12" WIDE, APPLIED
TO EITHER SIDE OF CORE.
INSTALL 5/8" DIA. LOCTITE TYFO
SCH COMPOSITE ANCHORS SIM.
DETAIL 8.
INSTALL 5/8" DIA. LOCTITE TYFO
SCH COMPOSITE ANCHORS SIM.
DETAIL 8.
6/30/25
5 6 7 8 910 11 12 13 14 15 16 17
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Sheet 3 of 6 Underside FRP -
Underground Plan
Revision No.Revised By Revision Date
Engineer Stamp
USC Keck Medicine
LOCTITE ® Tyfo ® FRP Systems are registered trademarks for the products of Henkel Corporation.
Email: mail-id-fyfesalesengineering@group.henkel.com
Orig. Date:Drafter:
Engineer:Rev. Date:
Dwg. No.:
2025/04/04JN
J.ALVARADO
Arcadia, CA
Slab Strengthening
N.T.S.
Underside FRP - Underground Plan2
(1) #5
(1) #5
(2) #5
(1) #5
(1) #5
(1) #5
(2) #5
(1) #5
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19
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17 16
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2
(2) #5 12
11
(3) LAYERS LOCTITE TYFO
SCH-41, 8" WIDE STRIPS
11" TO WALL.
SEE DETAIL 8
(2) LAYERS LOCTITE TYFO SCH-41,
8" WIDE STRIPS, (TYP.) (4) STRIPS
@ LOCATION #6
24" TO FACE OF WALL
V.I.F.
EXTEND LOCTITE TYFO SCH-41 SYSTEM
UP TO FACE OF EXISTING STRUCTURAL
CONC. WALL. AT THIS LOCATION.
(2) LAYERS LOCTITE TYFO SCH-41,
12" WIDE, APPLIED TO EITHER
SIDE OF CORE
(2) LAYERS LOCTITE TYFO SCH-41,
12" WIDE, APPLIED TO EITHER
SIDE OF CORE
6/30/25
Sheet 4 of 6 Typical Details
Revision No.Revised By Revision Date
Engineer Stamp
USC Keck Medicine
LOCTITE ® Tyfo ® FRP Systems are registered trademarks for the products of Henkel Corporation.
Email: mail-id-fyfesalesengineering@group.henkel.com
Orig. Date:Drafter:
Engineer:Rev. Date:
Dwg. No.:
2025/04/04JN
J.ALVARADO
Arcadia, CA
Slab Strengthening
N.T.S.
(1) #8 Bar Cut3
3-LAYERS OF THE LOCTITE TYFO SCH-41
SYSTEM, 24" TOTAL WIDTH, APPLIED TO
THE TOPSIDE OR UNDERSIDE OF THE
EXISTING STRUCTURAL CONCRETE SLAB.
(TYP.)
(E) CUT BARS
(E) CORE
PRIMARY FIBER DIRECTION (TYP.)
1" MAX. GAP (TYP.)
60
"
M
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(T
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12"12"
1-LAYER OF THE LOCTITE TYFO SCH-41
SYSTEM, 12" TOTAL WIDTH, APPLIED TO
THE TOPSIDE OR UNDERSIDE OF THE
EXISTING STRUCTURAL CONCRETE SLAB.
(TYP.)
(E) CUT BARS
(E) CORE
PRIMARY FIBER DIRECTION (TYP.)
1" MAX. GAP (TYP.)
12"
(TYP.)
N.T.S.
(1) #5 Bar Cut4
38
"
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(T
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SHEET NOTES:
1.FOR TOPSIDE FRP APPLICATIONS ONLY: INSTALL A KEY-COAT OF THICKENED LOCTITE
TYFO S EPOXY AND 10-16 MESH SAND, PER GENERAL NOTES.
2.FRP REINFORCEMENT IS ONLY SHOWN IN 1-DIRECTION. VERIFY IN FIELD DIRECTION OF
REBAR CUT AND APPLY FRP REINFORCEMENT PARALLEL TO CUT REBAR.
3.APPLY FRP TO SAME FACE OF SLAB (TOP OR BOTTOM) THAT REBAR WAS CUT.
4.TYPICAL DETAILS ARE SHOWN ON THIS SHEET. SEE PLANS FOR LOCATIONS
WHERE TYPICAL DETAILS HAVE BEEN MODIFIED TO ACCOUNT FOR
EXISTING SITE CONDITIONS.
6/30/25
Sheet 5 of 6 Typical Details
Revision No.Revised By Revision Date
Engineer Stamp
USC Keck Medicine
LOCTITE ® Tyfo ® FRP Systems are registered trademarks for the products of Henkel Corporation.
Email: mail-id-fyfesalesengineering@group.henkel.com
Orig. Date:Drafter:
Engineer:Rev. Date:
Dwg. No.:
2025/04/04JN
J.ALVARADO
Arcadia, CA
Slab Strengthening
2-LAYERS OF THE LOCTITE TYFO SCH-41
SYSTEM, 24" TOTAL WIDTH, APPLIED TO
THE TOPSIDE OF THE EXISTING
STRUCTURAL CONCRETE SLAB. (TYP.)
(E) CUT BARS
(E) CORE
PRIMARY FIBER DIRECTION (TYP.)
1" MAX. GAP (TYP.)
12"12"
N.T.S.
(2) #5 Bars Cut5
38
"
M
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N.T.S.
(1) #8 & (1) #5 Bar Cut6
4-LAYERS OF THE LOCTITE TYFO SCH-41
SYSTEM, 24" TOTAL WIDTH, APPLIED TO
THE TOPSIDE OR UNDERSIDE OF THE
EXISTING STRUCTURAL CONCRETE SLAB.
(TYP.)
(E) CUT BARS
(E) CORE
PRIMARY FIBER DIRECTION (TYP.)
1" MAX. GAP (TYP.)
60
"
M
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(T
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)
12"12"
SHEET NOTES:
1.FOR TOPSIDE FRP APPLICATIONS ONLY: INSTALL A KEY-COAT OF
THICKENED LOCTITE TYFO S EPOXY AND 10-16 MESH SAND, PER
GENERAL NOTES.
2.FRP REINFORCEMENT IS ONLY SHOWN IN 1-DIRECTION. VERIFY IN
FIELD DIRECTION OF REBAR CUT AND APPLY FRP
REINFORCEMENT PARALLEL TO CUT REBAR.
3.APPLY FRP TO SAME FACE OF SLAB (TOP OR BOTTOM) THAT
REBAR WAS CUT.
4.TYPICAL DETAILS ARE SHOWN ON THIS SHEET. SEE PLANS FOR
LOCATIONS WHERE TYPICAL DETAILS HAVE BEEN MODIFIED TO
ACCOUNT FOR EXISTING SITE CONDITIONS.
6/30/25
Sheet 6 of 6 Typical Anchor Details
at Obstructions
Revision No.Revised By Revision Date
Engineer Stamp
USC Keck Medicine
LOCTITE ® Tyfo ® FRP Systems are registered trademarks for the products of Henkel Corporation.
Email: mail-id-fyfesalesengineering@group.henkel.com
Orig. Date:Drafter:
Engineer:Rev. Date:
Dwg. No.:
2025/04/04JN
J.ALVARADO
Arcadia, CA
Slab Strengthening
(E) CONC. SLABLAYER(S) OF THE LOCTITE TYFO
SCH-41 SYSTEM, APPLIED TO
THE TOPSIDE OF THE SLAB, PER
PLANS.
3/4" DIA. HOLES FOR 5/8" DIA. TYFO SCH
COMPOSITE ANCHORS.
5/8" DIA. TYFO SCH COMPOSITE
ANCHORS SPACED MAXIMUM 6" ON
CENTER. USE MINIMUM 6" ANCHOR
SPLAY WIDTH. USE MINIMUM 12"
ANCHOR SPLAY LENGTH. DO NOT
DAMAGE EXISTING STEEL REINF.
FINISH REQUIREMENTS: APPLY A KEY COAT
OVER ALL TOPSIDE OF SLAB FRP
APPLICATIONS AS PER THE GENERAL NOTES.
N.T.S.
Typical Slab Flexural Section @ Step7
12" MIN.
ANCHOR SPLAY
3.
5
"
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7"
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@ 3
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1
5
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12
"
V
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6" ANC.
SPLAY WIDTH
12
"
A
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N.T.S.
Typical Slab Flexural Section @ Wall8
(E) CONC. WALLLAYER(S) OF THE LOCTITE TYFO
SCH-41 SYSTEM, APPLIED TO
THE TOPSIDE OF THE SLAB, PER
PLANS.
3/4" DIA. HOLES FOR 5/8" DIA.
TYFO SCH COMPOSITE
ANCHORS.
5/8" DIA. TYFO SCH COMPOSITE
ANCHORS SPACED MAXIMUM 6" ON
CENTER. USE MINIMUM 6" ANCHOR
SPLAY WIDTH. USE MINIMUM 12"
ANCHOR SPLAY LENGTH. DO NOT
DAMAGE EXISTING STEEL REINF.
12" MIN.
ANCHOR SPLAY
7"
M
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AN
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@ 3
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±
1
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6" ANC.
SPLAY WIDTH
12
"
A
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SP
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T
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FINISH REQUIREMENTS: APPLY A KEY COAT
OVER ALL TOPSIDE OF SLAB FRP
APPLICATIONS AS PER THE GENERAL NOTES.
12
"
V
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F
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(E) CONC. SLAB
6/30/25
04/08/2025
Designed by: JA
Checked by: TL
USC Keck Medicine
57 Wheeler Arcadia, CA 91006
Structural Engineer of Record:
Buehler Engineering
725 S. Figueroa St., 37th Floor ,
Los Angeles, CA 90017
Calculations:
1. Tension Equivalence Calculation
Disclaimer:Fyfe Company did not analyze the capacity of the existing structural members or its condition, nor did Fyfe Company
provide the loading demand values used for the FRP design.The composite system was designed only to provide the additional
capacity as noted in the calculations.Additionally, thermal gradation effects were not considered in the FRP design.
REFERENCES
1.ACI 440.2 R-17, Guide for the Design and Construction of Externally Bonded FRP Systems for
Strengthening Concrete Structures.
2.ACI 318-19, Building Code Requirements for Structural Concrete (ACI 318-19) and Commentary.
Page 1 of 8
444 S. Flower Street, Suite 750
6/30/25
Scott F Arnold
Digitally signed by Scott F ArnoldDN: E=sfarnold@gmail.com, CN=Scott F Arnold, O="FYFEFRP, LLC", SERIALNUMBER=AATL20240603352145, L=Houston, S=Texas, C=USDate: 2025.04.08 12:28:24-07'00'
04/08/2025
Designed by: JA
Checked by: TL
USC Keck Medicine
Tension Equivalence Calculations______________________________________________________________________________________
1.0 DESIGN GOAL
Design the Tyfo® FRP Systems to the equivalent tension capacity of steel at the topside or underside of an
existing reinforced concrete slab, as specified by Buehler Engineering.
2.0 GENERAL NOTES AND ASSUMPTIONS
1.2.The assumed concrete compressive strength is 3000 psi.
The assumed effective strain on the FRP system is taken as the minimum of 0.004 or the flexural de-
bonding equation per ACI 440.2R-17 equation 10.1.1.
3.0 PROPERTIES OF THE TYFO SCH-41 CARBON COMPOSITE SYSTEM
Ultimate Properties environmental reduction factor for interior
environment (table 9.4) ≔Ce 0.95
≔ffu 131 ksi*ultimate tensile stress
≔ffu =⋅Ce ffu 124.5 ksi*reduced ultimate tensile stress(eq. 9.4a)
≔εfu 0.009*ultimate design strain
≔εfu =⋅Ce εfu 0.0086*reduced ultimate design strain (eq. 9.4b)
≔Ef =―ffu
εfu
14556 ksi reduced modulus of elasticity (eq. 9.4c)
≔Ef ⋅12660 ksi design modulus of elasticity
≔tf ⋅0.04 in thickness per layer
Reduction factors
≔ψf 0.85 FRP reduction factor
Concrete properties
≔f'c ⋅4000 psi assumed concrete compressive strength
≔fy 60000 psi yield strength of steel
5.0 TENSION EQUIVALENCE CALCULATION Page 2 of 8
04/08/2025
Designed by: JA
Checked by: TL
5.0 TENSION EQUIVALENCE CALCULATION
5.1 (1) #8 Gr. 60 Rebar
≔Ab 0.79 in2 area of (1) #8 rebar
≔nb 1 number of bars
≔As =⋅nb Ab 0.79 in2 area of steel
≔Treq =⋅As fy 47.4 kip tension force required
≔n 3 number of layers of FRP
≔wf 24 in width of FRP
de-bonding strain per ACI
440.2R-17 eq. 10.1.1≔εfd =⋅0.083 ‾‾‾‾‾‾‾‾‾――――f'c
⋅⋅⋅n Ef tf ―1
in
0.00426
≔εfe =min ⎛⎝,0.002 εfd⎞⎠0.002 effective FRP strain per structural
drawings on S0.001
≔ffe =⋅Ef εfe 25.3 ksi effective stress in fiber
≔Af =⋅⋅n wf tf 2.88 in2 area of fiber
≔Tf =⋅⋅ψf Af ffe 62 kip tension capacity of FRP
demand capacity ratio ≔DCR =――Treq
Tf
0.8
Page 3 of 8
04/08/2025
Designed by: JA
Checked by: TL
5.2 (1) #5 Gr. 60 Rebar
≔Ab 0.31 in2 area of (1) #5 rebar
≔nb 1 number of bars
≔As =⋅nb Ab 0.3 in2 area of steel
≔Treq =⋅As fy 18.6 kip tension force required
≔n 1 number of layers of FRP
≔wf 24 in width of FRP
de-bonding strain per ACI
440.2R-17 eq. 10.1.1≔εfd =⋅0.083 ‾‾‾‾‾‾‾‾‾――――f'c
⋅⋅⋅n Ef tf ―1
in
0.00738
≔εfe =min⎛⎝,εfd 0.002⎞⎠0.002 effective FRP strain per structural
drawings on S0.001
≔ffe =⋅Ef εfe 25.3 ksi effective stress in fiber
≔Af =⋅⋅n wf tf 0.96 in2 area of fiber
≔Tf =⋅⋅ψf Af ffe 20.66 kip tension capacity of FRP
demand capacity ratio ≔DCR =――Treq
Tf
0.9
5.3 (2) #5 Gr. 60 Rebar Page 4 of 8
04/08/2025
Designed by: JA
Checked by: TL
5.3 (2) #5 Gr. 60 Rebar
≔Ab 0.31 in2 area of (1) #5 rebar
≔nb 2 number of bars
≔As =⋅nb Ab 0.6 in2 area of steel
≔Treq =⋅As fy 37.2 kip tension force required
≔n 2 number of layers of FRP
≔wf 24 in width of FRP
de-bonding strain per ACI
440.2R-17 eq. 10.1.1≔εfd =⋅0.083 ‾‾‾‾‾‾‾‾‾
――――f'c
⋅⋅⋅n Ef tf ―1
in
0.00522
≔εfe =min ⎛⎝,εfd 0.002⎞⎠0.002 effective FRP strain per structural
drawings on S0.001
≔ffe =⋅Ef εfe 25.3 ksi effective stress in fiber
≔Af =⋅⋅n wf tf 1.92 in2 area of fiber
≔Tf =⋅⋅ψf Af ffe 41.32 kip tension capacity of FRP
demand capacity ratio ≔DCR =――Treq
Tf
0.9
5.4 (1) #5 & (1) #8 Gr. 60 Rebar
Page 5 of 8
04/08/2025
Designed by: JA
Checked by: TL
5.4 (1) #5 & (1) #8 Gr. 60 Rebar
≔Ab5 0.31 in2 area of (1) #5 rebar
≔Ab8 0.79 in2 area of (1) #8 rebar
≔nb 1 number of bars
≔As =+⎛⎝⋅nb Ab5⎞⎠⎛⎝⋅nb Ab8⎞⎠1.1 in2 area of steel
≔Treq =⋅As fy 66 kip tension force required
≔n 4 number of layers of FRP
≔wf 24 in width of FRP
de-bonding strain per ACI
440.2R-17 eq. 10.1.1≔εfd =⋅0.083 ‾‾‾‾‾‾‾‾‾――――f'c
⋅⋅⋅n Ef tf ―1
in
0.00369
≔εfe =min⎛⎝,εfd 0.002⎞⎠0.002 effective FRP strain per structural
drawings on S0.001
≔ffe =⋅Ef εfe 25.3 ksi effective stress in fiber
≔Af =⋅⋅n wf tf 3.84 in2 area of fiber
≔Tf =⋅⋅ψf Af ffe 82.64 kip tension capacity of FRP
demand capacity ratio ≔DCR =――Treq
Tf
0.8
Page 6 of 8
04/08/2025
Designed by: JA
Checked by: TL
6.0 TYFO SCH COMPOSITE ANCHOR CALCULATIONS
≔wf 6 in width of FRP strip tributary per (1) anchor
≔α 1.5 anchor tension amplification factor
≔Treqa =⋅⋅⋅⋅⋅α ψf n tf wf ffe 31 kip total force required per 6" wide FRP strip
≔ffa ⋅110 ksi minimum ultimate strength up to 7/8" diameter
≔d ⋅―5
8 in diameter of composite anchor
≔Afa =――⋅π d2
4 0.307 in2 area of composite anchor
≔Tfa =⋅Afa ffa 33.75 kip anchor capacity
≔nfa =――Treqa
Tfa
0.92 total required quantity of anchors
≔nfa 2 number of anchors to be used
Therefore, use (1) 5/8 in. diameter Tyfo SCH Composite Anchors per 6 in. of fiber width (4 layers)to provide
the required force transfer.
Page 7 of 8
04/08/2025
Designed by: JA
Checked by: TL
Anchor Development Calculation -Bonding to Fiber
force to be developed between anchors and
FRP for (1) anchor≔Treqa =――Treqa
nfa
15.5 kip
≔σ ⋅500 psi minimum bond strength of FRP to composite anchor
≔lsw ⋅6 in anchor splay width
≔ls ⋅12 in anchor splay length
≔n 4 number of layers
≔Tb =‖‖‖‖‖‖‖‖‖
|||||||||
|||||
if ＝n 1‖‖‖‖
⋅⋅⋅―1
2 lsw ls σ
||||
if >n 1‖‖⋅⋅lsw ls σ
36 kip
force to be developed through bond for one layer of
FRP (bonded on one face)
=Tb 36 kip force to be developed through bond
≔DCRA =――Treqa
Tb
0.43
7.0 CONCLUSION
Apply three (3) layers of the Tyfo SCH-41 system, 24" total width, to match the equivalent tension capacity of (1) #8 Grade
60 steel rebar at the underside of an existing reinforced concrete slab.
Apply one (1) layer of the Tyfo SCH-41 system , 24" total width, to match the equivalent tension capacity of (1) #5 Grade
60 steel rebar at the underside of an existing reinforced concrete slab.
Apply two (2) layers of the Tyfo SCH-41 system , 24" total width, to match the equivalent tension capacity of (2) #5 Grade
60 steel rebar at the underside of an existing reinforced concrete slab.
Apply four (4) layers of the Tyfo SCH-41 system, 24" total width, to match the equivalent tension capacity of (1) #8 & (1)
#5 Grade 60 steel rebar at the underside of an existing reinforced concrete slab.
Install (1) 5/8" diameter Tyfo SCH composite anchors for each 6" strip (where required per plans) with a
minimum 6" splay width and minimum 12" splay length.
Page 8 of 8