Anchor Fastening Technical Guide , Edition 22
Table 94 — Suggested embedment and edge distance ( see figure below ) based on CSA 23.3 Annex D to develop 125 % of f y in Canadian 400 MPa wall / column starter bars in a linear array with bar spacing = 450 mm - non-seismic only 1 , 2 , 3 , 4 , 5
ƒ ́c = 20 MPa ƒ ́c = 25 MPa ƒ ́c = 30 MPa ƒ ́c = 40 MPa
Rebar size
Linear spacing s mm
Effective embed .
h ef mm
Cond . I
Minimum edge dist
c a , min mm
Cond . II
Effective embed .
h ef mm
Cond . I
Minimum edge dist
c a , min mm
Cond . II
Effective embed .
h ef mm
Cond . I
Minimum edge dist
c a , min mm
Cond . II
Effective embed .
h ef mm
Cond . I
Minimum edge dist
c a , min mm
10M 180 480 220 170 470 200 160 450 190 150 430 180
450 15M 400 1,090 590 340 950 510 300 840 440 240 690 360
1 h ef is the calculated bar embedment based on uncracked bond and concrete breakout strengths using equations in section 3.1.14.4 to develop 125 % of nominal bar yield . Shaded embedment values exceed 20 bar diameters . For non-tabulated rebar sizes , design per development length provisions is recommended . The particular assumptions used for the application of anchor theory to bar development ( e . g ., bar yield and bond strength values ) are a matter of engineering judgment and will in part depend on the specific circumstances of the design . For embedments corresponding to nominal yield ( i . e ., no overstrength ) multiply the tabulated hef values by 0.86 .
2 c a is the minimum edge distance ( from bar centerline ) associated with the tabulated embedments and s = 450 mm . Refer to sec . 3.1.14.3 for applicability of edge distance “ Condition I ” and “ Condition II .”
3 Values determined with bond stresses , k-factors and strength reduction factors taken from ESR-3814 , Tables 12 and 13 assuming dry , uncracked concrete conditions where concrete temperatures will not exceed a maximum short-term temperature of 130 ° F ( 55 ° C ) and long-term temperature of 110 ° F ( 43 ° C ). Bond stresses are for static ( non-seismic ) loading conditions . 4 Values are for normal weight concrete . For lightweight concrete contact Hilti . 5 Refer to the Hilti North America Post-Installed Reinforcing Bar Guide for further explanation , background information , and design examples . See Hilti Instructions for Use ( IFU ) for specific installation requirements .
Cond . II
3.2.3
≥ c a , min s = 450 mm s = 450 mm
( N ) ≥ c a , min h ef
SECTION ( E )
Bars in linear array
SECTION Illustration of Table 94 dimensions
PLAN
Anchor Fastening Technical Guide Edition 22 | 3.0 ANCHORING SYSTEMS | 3.2.3 HIT-RE 500 V3 EPOXY ADHESIVE ANCHORING SYSTEM Hilti , Inc . 1-800-879-8000 | en español 1-800-879-5000 | www . hilti . com | Hilti ( Canada ) Corporation | www . hilti . ca | 1-800-363-4458
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