Hilti HIT FP 700-R Bedienungsanleitung Seite 21

European technical assessment ETA-2 1 / 0 6 2 4
English translation prepared by CSTB
Minimum anchorage length and minimum lap length under static loading
Minimum anchorage length, minimum lap length and design values of the bond strength for a
working life of 50 and 100 years for following drilling techniques:

hammer drilling,

hammer drilling with Hilti hollow drill bit TE-CD, TE-YD,

diamond coring with roughening with Hilti Roughening tool TE-YRT.
The minimum anchorage length l
multiplied by the amplification factor α
The design values of the bond strength f
multiplying the design value of the bond strength f
efficiency factor k = k
b
Amplification factor α
Table C1:
Rebar diameter
ϕ 8 to ϕ 40
Table C2: Bond efficiency factor k
Rebar diameter
ϕ 8
ϕ 10
ϕ 12
ϕ 14
ϕ 16
ϕ 18
ϕ 20
ϕ 22
ϕ 25
ϕ 26
ϕ 28
ϕ 30
ϕ 32
ϕ 34
ϕ 36
ϕ 40
Injection system Hilti HIT-FP 700 R for rebar connections
Performances
Amplification factor and bond efficiency factor
Design values of the bond strength f
and the minimum lap length l
b,min
= α
lb lb,100y
and f
bd,PIR
according to Table C2.
b,100y
lb
C12/15 C16/20 C20/25
C12/15 C16/20 C20/25
1,00 0,80 0,70
1,00 0,87
1,00
1,00
1,00
1,00
1,00
1,00
1,00
1,00
1,00
1,00
1,00
1,00
1,00
1,00
and f
bd,PIR bd,PIR,100y
according to EN 1992-1-1 shall be
0,min
given in Table C1.
are given in Table C3. It is obtained by
bd,PIR,100y
according to EN 1992-1-1 (Eq. 8.3) by the bond
bd
and α
lb,100y
Amplification factor 
lb
Concrete class
C25/30 C30/37
1,5
and k
b b,100y
Bond efficiency factor k
b
Concrete class
C25/30 C30/37
0,59 0,53
0,74 0,67
0,85 0,77
0,85 0,77
1,00 0,90
1,00 0,90
1,00 0,90
1,00 0,90
1,00 0,90
0,85 0,77
0,85 0,77
0,85 0,77
0,85 0,77
0,74 0,67
0,74 0,67
0,85 0,77
for static loading
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= 
[-]
lb,100y
C35/45 C40/50 C45/55
= k [-]
b,100y
C35/45 C40/50 C45/55
0,47 0,43 0,40
0,59 0,54 0,50
0,68 0,62 0,58
0,68 0,62 0,58
0,79 0,73 0,68
0,79 0,73 0,68
0,79 0,73 0,68
0,79 0,73 0,68
0,79 0,73 0,68
0,68 0,62 0,58
0,68 0,62 0,58
0,68 0,62 0,58
0,68 0,62 0,58
0,59 0,54 0,50
0,59 0,54 0,50
0,68 0,62 0,58
Annex C1
C50/60
C50/60
0,37
0,47
0,53
0,53
0,63
0,63
0,63
0,63
0,63
0,53
0,53
0,53
0,53
0,47
0,47
0,53