DESIGN DATA IN CONCRETE PER ALLOWABLE STRESS DESIGN
Anchor spacing and edge distance guidelines
Anchor spacing adjustment factors s = Actual spacing
Edge distance adjustment factors c = Actual edge distance s min
= 1.0 h nom
s cr
= 3.0 h ef c min
= 1.0 h nom
c cr
= 2.5 h ef
c min
= 1.0 h nom
c cr
= 2.5 h nom
Tension
Shear
Anchor Size h nom mm ( in .)
M10 75 ( 3 ) M12 80 ( 3-3 / 16 ) M16 105 ( 4-1 / 8 ) M20 130 ( 5-1 / 8 ) h ef
- actual embedment depth h nom
- standard embedment depth
Load adjustment factors ( anchor spacing ) ƒ A Load adjustment factors ( edge distance ) ƒ R
|
Tension / Shear |
|
Tension ƒ RN
|
Shear ƒ RV
|
Spacing s |
Anchor diameter |
Edge distance c |
Anchor diameter |
Anchor diameter |
mm ( in .) M10 M12 M16 M20 mm ( in .) M10 M12 M16 M20 M10 M12 M16 M20
65 |
( 2-1 / 2 ) |
|
65 |
( 2-1 / 2 ) |
|
|
75 |
( 3 ) |
. 70 |
75 |
( 3 ) |
. 70 |
. 30 |
80 |
( 3-1 / 8 ) |
. 71 |
. 70 |
|
80 |
( 3-1 / 8 ) |
. 71 |
. 70 |
|
. 33 |
. 30 |
|
105 |
( 4-1 / 8 ) |
. 76 |
. 74 |
. 70 |
105 |
( 4-1 / 8 ) |
. 78 |
. 76 |
. 70 |
. 48 |
. 44 |
. 30 |
130 ( 5-1 / 8 ) . 81 . 79 . 73 . 70 130 ( 5-1 / 8 ) . 85 . 83 . 74 . 70 . 64 . 59 . 41 . 30 155 ( 6-1 / 8 ) . 86 . 84 . 77 . 72 155 ( 6-1 / 8 ) . 91 . 88 . 79 . 73 . 80 . 74 . 52 . 39 175 ( 6-7 / 8 ) . 90 . 87 . 80 . 75 162 ( 6-3 / 8 ) . 93 . 90 . 80 . 75 . 84 . 78 . 55 . 41 195 ( 7-5 / 8 ) . 94 . 91 . 82 . 77 187 ( 7-3 / 8 ) 1.0 . 96 . 85 . 78 1.0 . 92 . 66 . 50 225 ( 8-7 / 8 ) 1.0 . 97 . 87 . 80 200 ( 7-7 / 8 ) 1.0 . 88 . 80 1.0 . 72 . 55 240 ( 9-3 / 8 ) 1.0 . 89 . 82 225 ( 8-7 / 8 ) . 92 . 84 . 83 . 64 275 ( 10-3 / 4 ) . 94 . 86 265 ( 10-3 / 8 ) 1.0 . 91 1.0 . 79 315 ( 12-3 / 8 ) 1.0 . 91 275 ( 10-3 / 4 ) . 92 1.0 . 82 350 ( 13-3 / 4 ) . 95 300 ( 11-3 / 4 ) . 96 . 91 395 ( 15-1 / 2 ) 1.0 325 ( 12-3 / 4 ) 1.0 1.0 430 ( 17 ) 350 ( 13-3 / 4 ) 470 ( 18-1 / 2 ) 390 ( 15-3 / 8 )
|
s min
= 1.0 h nom
ƒ A
= 0.15 s + 0.55 h ef
s cr
= 3.0 h ef
|
c min
= 1.0 h nom c cr
= 2.5 h ef c – 1.0 h ƒ RN
= ( 0.30 )
( nom
2.5 h ef
– 1.0 h nom
)
|
+ 0.70 |
c min
= 1.0 h nom c cr
= 2.5 h nom
ƒ RV
= 0.47
c
h nom
– 0.17
|
for s cr > s > s min
|
for c cr > c > c min
|
|
for c cr
> c > c min
|
294 Anchor Fastening Technical Guide Edition 22 | 3.0 ANCHORING SYSTEMS | 3.3.4 HSL-GR STAINLESS STEEL HEAVY DUTY EXPANSION ANCHORS 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