Hi
lti HIT-RE 500-SD mortar
w/
rebar (as post-installed
conn.
)
Thes
e pages
are part of the Anchor
Fas
tening
Technology Manual
is
s
ue September 2014
09 /
2014
904
b) bar
connection
parallel
to slab
or wall
surface
exposed
to fire
Max.
bond
stress,
W
T
, depending
on
actual clear concrete cov
er
for classifying the fire
resistance.
It must be verified
that the actual force
in the bar during
a fire, F
s,T
,
can be taken up by the
bar connection of the
selected length,
A
inst
.
Note:
Cold design for ULS is
mandatory.
F
s, T
d
(
A
inst
– c
f
)
I
S
W
T
where:
(
A
inst
– c
f
)
t
A
s
;
A
s
= lap length
I
= nominal
diameter
of bar
A
inst
– c
f
=
selected ov
erlap
joint length;
this must be at least
A
s
,
but may not
be assumed to be more than 80
I
W
T
= bond
stress when
exposed
to fire
Critical temperature-dependent bond stress
,
W
W
c
,
concerning “overlap joint” for Hilt
i HIT-RE 500-SD injection
adhesive in relation to fire res
istance class
and required minimum concrete coverage c.
Clear concrete cove
r c
Max.
bond s
tress
,
W
W
c
[N/mm²]
[mm]
R30
R60
R90
R120
R180
R240
10
0
0
0
0
0
0
20
0,49
30
0,66
40
0,89
0,48
50
1,21
0,62
60
1,63
0,80
0,51
70
2,19
1,04
0,65
0,49
80
2,96
1,35
0,83
0,61
90
3,99
1,75
1,06
0,77
0,45
100
5,38
2,26
1,36
0,97
0,55
110
7,25
2,93
1,73
1,23
0,67
0,47
120
9,78
3,79
2,21
1,55
0,81
0,55
130
11,00
4,91
2,81
1,96
0,98
0,64
140
6,35
3,59
2,47
1,18
0,76
150
8,22
4,58
3,12
1,43
0,89
160
10,65
5,84
3,94
1,73
1,04
170
11,00
7,45
4,97
2,10
1,23
180
9,51
6,27
2,54
1,44
190
11,00
7,91
3,07
1,69
200
9,99
3,71
1,99
210
11,00
4,49
2,34
220
5,44
2,75
230
6,58
3,22
240
7,96
3,79
250
9,64
4,45
260
11,00
5,23
270
6,14
280
7,21
290
8,47
300
9,95
310
11,00
