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Backward Expanding Bottom Anchor Bolt THK
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- Product Description
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Product description:
·It consists of screw, thrust sleeve, flat washer, spring washer and nut. After punching a straight hole in the concrete substrate, the hole is reamed again at the bottom of the hole, and the cavity after reaming and the key piece of the anchor bolt open form an interlocking mechanism to realise the post-anchorage connection.Application:
·Curtain wall pre-embedded parts fixing
·Curtain wall keel fixingMaterial:
·Grade 4.8 steel, Grad 5.8 steel, Grade 8.8 steel, Stainless Steel 304(A2-70)/316(A4-80)
·Surface treatment (except stainless steel)：
Electro-galvanised (zinc layer thickness >5um), to be used in normal environments.
Hot-dip galvanised (zinc layer thickness >45um), to be used in corrosive environments.Substrate:
·Non-cracked concrete/cracked concrete
·Natural stoneAdvantages:
·Mechanical key-locking effect for shallow burial depths and high load carrying capacity
·Almost no expansion stresses, suitable for anchoring with small margins
·Maximum tensioning of the expansion piece to achieve the desired force condition
·Maximum design load immediately after installation, no waiting time (compared to chemical anchors)Operation process
1、 Use straight hole drill bit to drill the corresponding diameter and depth of the empty
2、 Use special bottom-expanding drill bit to shake the bottom to make the bottom expand into a wedge-shaped hole.
3、 Use the dust blower to blow dust into the hole until no dust overflows from the hole.
4、 Strike the anchor bolt after expanding the bottom, make the bottom rise open to complete the anchoring
Product specifications and technical parameters
Product type
Drilling diameter do(mm)
Drilling depth h1(mm)
Effective anchorage depth ho(mm)
Maximum anchorage thickness tfix(mm)
Screw length L(mm)
Screw specification
Anchorage hole diameter r(mm)
Minimum bolt spacing Smin(mm)
Minimum substrate thickness h(mm)
Preset
Penetrating
THK 14*40 M10/25
14
45
40
25
80
M10
12
16
40
80
THK 16*60 M10/25
16
65
60
25
100
M10
12
16
60
100
THK 18*60 M12/35
18
70
60
35
110
M12
14
20
60
100
THK 18*80 M12/35
18
90
80
35
130
M12
14
20
80
120
THK 18*100 M12/35
18
110
100
35
150
M12
14
20
100
150
THK 22*100 M16/40
22
110
100
40
160
M16
18
24
100
150
THK 22*125 M16/45
22
130
125
45
190
M16
18
24
120
170
THK 28*160 M20/75
28
180
160
75
260
M20
24
32
160
230
THK 28*200 M20/75
28
220
200
75
300
M20
24
32
200
290
Table of basic design parameters
Product Model M8
M10
M12
M16
M20
M24
M30
Reference values for tensile design values on C30 non-cracked concrete
Level 5.8 --
13.8
19.8
30.9
52.4
--
--
Level 8.8 16.8
22.9
34.5
58.8
A2-70
15.3
20.8
32.3
55.8
A2-80
16.8
22.9
34.5
58.8
C30 non-cracked concrete Upper shear design reference value
Level 5.8 --
10.5
14.8
27.8
45.5
--
--
Level 8.8 13.1
19.0
32.3
55.2
A2-70
12.6
18.3
29.0
51.4
A2-80
13.1
19.0
32.3
55.2
Reference values for tensile design on C30 cracked concrete
Level 5.8 --
11.0
17.2
24.5
44.0
--
--
8.8级
A2-70
A2-80
Reference values for shear design on C30 cracked concrete
Level 5.8 --
10.5
14.5
27.8
45.5
--
--
Level 8.8 13.1
19.0
32.3
55.2
A2-70
12.6
18.3
29.0
51.4
A2-80
13.1
19.0
32.3
55.2
Table of basic design parameters Note:
Backward Expanding Bottom Anchor Bolt THK
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