Modular Support Systems Technical Guide, Edition 2
3.0 Modular Support System
3.2.1 MT Connection Mechanisms
MT-THB OC
Description
T-Head bolt and nut for structural connection in the serrated channel of the MT 90H profile. The bolt must be twisted into the serrated channel by hand. The nut is fastened using an M17( 11 / 16”) diameter socket.
Material Specifications High Strength Steel
Corrosion Protection
Description
Environmental Conditions MT-THB OC Outdoor, low to moderate pollution( C3 / C4- low) MT-THB M12x33 OC Outdoor, low to moderate pollution( C3 / C4- low)
Ordering Information
Description
Weight Per Piece, lbs( kg)
Quantity Piece( s)
Item No. MT-THB OC 0.11( 0.05) 25 2431080 MT-THB M12x33 OC 0.11( 0.05) 25 2431092
Figure 9 – MT Connection
Table 120- Allowable Strength Design( ASD) Load Data 1, 2, 3 Pullout
Slip lb( kN) lb( kN)
1,530 1,395
( 6.81)
( 6.21)
1 Minimum safety factor Ω, for tabulated values is 2.68. 2 Multiply tabulated values by 1.5 to obtain minimum Load and
Resistance Factor Design( LRFD) values. 3 See Figure 9.
A. MT-THB
Table 121- Limit State Design( LSD) Load Data 1, 2 Pullout
Slip lb( kN) lb( kN)
1,970 1,800
( 8.78)
( 8.01)
1 Maximum resistance factor φ, for tabulated values, is 0.48. 2 See Figure 9.
75