Anchor Fastening Technical Guide , Edition 22
Table 29 — HVU2 adhesive capsule design information with Hilti HIS-N and HIS-RN internally threaded inserts per CSA A23.3 Annex D 1 , 2 Diamond core drilling
Design parameter Symbol Units
Temp . range A 3
Temp . range B 3
Temp . range C 3
Nominal rod diameter ( in .) 3 / 8 1 / 2 5 / 8 3 / 4
Ref A23.3-14
Characteristic bond stress in cracked concrete 4 , 5
|
τ cr
|
psi
( MPa )
|
505
( 3.49 )
|
505
( 3.49 )
|
505
( 3.49 )
|
505
( 3.49 )
|
D . 6.5.2 |
Characteristic bond stress in uncracked concrete 4 , 5
|
τ uncr
|
psi
( MPa )
|
1,415
( 9.77 )
|
1,415
( 9.77 )
|
1,415
( 9.77 )
|
1,415
( 9.77 )
|
D . 6.5.2 |
Characteristic bond stress in cracked concrete 4 , 5
|
τ cr
|
psi
( MPa )
|
475
( 3.28 )
|
475
( 3.28 )
|
475
( 3.28 )
|
475
( 3.28 )
|
D . 6.5.2 |
Characteristic bond stress in uncracked concrete 4 , 5
|
τ uncr
|
psi
( MPa )
|
1,330
( 9.17 )
|
1,330
( 9.17 )
|
1,330
( 9.17 )
|
1,330
( 9.17 )
|
D . 6.5.2 |
Characteristic bond stress in cracked concrete 4 , 5
|
τ cr
|
psi
( MPa )
|
305
( 2.11 )
|
305
( 2.11 )
|
305
( 2.11 )
|
305
( 2.11 )
|
D . 6.5.2 |
Characteristic bond stress in uncracked concrete 4 , 5
|
τ uncr
|
psi
( MPa )
|
855
( 5.89 )
|
855
( 5.89 )
|
855
( 5.89 )
|
855
( 5.89 )
|
D . 6.5.2 |
Reduction for seismic tension α N , seis - 1.0
3.2.6
1 Design information in this table is based on testing in accordance with ACI 355.4 . 2 Items from Table 28 ( d a
, h ef , h min
, c ac , c min
, s min
, k c , uncr , k c , cr
, R and Ф factors ) are applicable to this table for diamond core drilling .
3 Temperature range A : Max . short term temperature = 130 ° F ( 55 ° C ), max . long term temperature = 110 ° F ( 43 ° C ). Temperature range B : Max . short term temperature = 176 ° F ( 80 ° C ), max . long term temperature = 110 ° F ( 43 ° C ). Temperature range C : Max . short term temperature = 248 ° F ( 120 ° C ), max . long term temperature = 162 ° F ( 72 ° C ). Short term elevated concrete temperatures are those that occur over brief intervals , e . g ., as a result of diurnal cycling . Long term concrete temperatures are roughly constant over significant periods of time .
4 Bond strength values corresponding to concrete compressive strength f ’ c = 2,500 psi ( 17.2 MPa ). For concrete compressive strength , f ’ c , between 2,500 psi ( 17.2 MPa ) and 8,000 psi ( 55.2 MPa ), the tabulated characteristic bond strength may be increased by a factor of ( f ́c / 2,500 ) n [ for SI : ( f ́c / 17.2 ) n ], where n is as follows : n = 0 for uncracked concrete , all drilling methods n = 0.18 for cracked concrete , diamond core drill bit 5 Characteristic bond strengths are for horizontal and vertical downward direction only . For overhead ( vertical up ) installation , bond strengths must be multiplied by 0.70 .
Table 30 — Steel factored resistance for steel bolt / cap screw for Hilti HIS-N and HIS-RN internally threaded inserts 1 , 2 , 3
ASTM A193 B7 ASTM A193 Grade B8M Stainless Steel
Thread size |
Tensile 4
N sar lb ( kN )
|
Shear 5
V sar lb ( kN )
|
Seismic Shear 6
V sar , eq lb ( kN )
|
Tensile 4
N sar lb ( kN )
|
Shear 5
V sar lb ( kN )
|
Seismic Shear 6
V sar , eq lb ( kN )
|
3 / 8-16 UNC
1 / 2-13 UNC
5 / 8-11 UNC
3 / 4-10 UNC
5,765 3,215 2,250 5,070 2,825 1,975 ( 25.6 ) ( 14.3 ) ( 10.0 ) ( 22.6 ) ( 12.6 ) ( 8.8 ) 9,635 5,880 4,115 9,290 5,175 3,620 ( 42.9 ) ( 26.2 ) ( 18.3 ) ( 41.3 ) ( 23.0 ) ( 16.1 ) 16,020 9,365 6,555 14,790 8,240 5,770 ( 71.3 ) ( 41.7 ) ( 29.2 ) ( 65.8 ) ( 36.7 ) ( 25.7 ) 16,280 13,860 9,700 21,895 12,195 8,535 ( 72.4 ) ( 61.7 ) ( 43.1 ) ( 97.4 ) ( 54.2 ) ( 38.0 )
1 See Section 3.1.8 to convert design strength value to ASD value . 2 Hilti HIS-N and HIS-RN inserts with steel bolts are considered brittle steel elements . 3 Table values are the lesser of steel failure in the HIS-N insert or inserted steel bolt . 4 Tensile = A se , N ф s f uta
R as noted in CSA A23.3 Annex D .
5 Shear = A se , V ф s
0.60 f uta R as noted in CSA A23.3 Annex D . For 3 / 8-in diameter insert , shear = A se , V ф s
0.50 f uta R .
6 Seismic Shear = α V , seis
V sar
: Reduction factor for seismic shear only . See section 3.1.8 for additional information on seismic applications .
Anchor Fastening Technical Guide Edition 22 | 3.0 ANCHORING SYSTEMS | 3.2.6 HVU2 CAPSULE 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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