The T-bolts are widely used in the anchoring system and available in a choice of diameters and lengths
for each cast-in channel size
Fixings to cast-in channels are by drop forged T-head bolts, face-entered into the channel after the concrete has set. The projecting bolt has a notch on the end of the shank so that the correct engagement of the T-head in the channel lips can be clearly seen. The allowable load capacity of a fixing depends on the channel type and the anchor spacing and position
T-head bolt Grade 4.6 or stainless steel |
Diameter |
Max allowable load on bolt shank
Pull-out/transverse shear |
M20 |
27.0KN |
M16 |
17.3KN |
M12 |
9.3KN |
M10 |
6.4KN |
M8 |
4.0KN |
M6 |
2.2KN |
Tightening Torgue |
T-head bolt Grade 4.6 |
T-head bolt Grade 8.8 |
Diameter |
Stainless Steel(N/m) |
(N/m) |
M30 |
400 |
- |
M27 |
300 |
500 |
M24 |
200 |
500 |
M20 |
120 |
300 |
M16 |
60 |
150 |
M12 |
25 |
70 |
M10 |
15 |
30 |
M8 |
8 |
- |
M6 |
3 |
- |
M16 toothed |
70 |
70 |
M12 toothed |
25 |
70 |
Concerning standards
Standard grade T-bolts ASTM F568 Grade 4.6
High tensile T-bolts ASTM F568 Grade 8.8
Restraint straps ASTM A572 Grade 50
HDG (Hot dip galvanizing) ASTM A153
EP (Zinc electroplating) ASTM B633
GEODA Metal Industries Co., Ltd. is a member of RUNTONG Group Company, its derived from Runson Technology Industries, Co., Ltd. And committed to becoming a leading manufacturer of high quality pre-cast metal products in the line of curtain-wall and tunnel construction industry
GEODA is a registered trademark owning by our company with series type code GTA, GXA, GSA, GP etc. Which offering cost-effective, technically superior solutions to suit any applications of the construction site. GEODA provides a comprehensive range of fixing, supporting and suspending systems to the curtain-wall and tunnel pre-cast industry.
Based on the superiority of technical experience and skills in making the roll forming machinery, close working relationship with many steel mills, we extend the field of products available to the variety of steel profiles, such as the cast-in channels, guide rails, solar brackets and structural brackets are the best sellers, by OEM and Licensing manufacturing, we have improved our technology and ability and acquired very comprehensive understanding of different standards, together with certificates TUV and CE, etc. We are able to satisfy any demands with complete range of types based on the high technical solution by our experienced engineers
We have created a good reputation and trust from customers for our products` reliable quality, timely delivery, and good after-sales services. Our goal is to make the high quality products to be much convenient and safer to use while the cost to be more economic to approach the budget of the construction projects
