Modular Supports System Product Technical Guide June 2026 | Page 88

Modular Support Systems Technical Guide, Edition 2
3.0 Modular Support System
3.2.2 MT Base Connectors
MT-B-GL O4 OC
Description
4-hole base plate for MT-90 or MT 90H girder-to-concrete. Meant to be installed with the Hilti Thread Forming Bolt.
Material Specifications
Description
Standard
Grade
F y, ksi
( MPa)
MT-B-GL O4U OC
( GB / T 1591) 1
( Q355 B) 1
51.49
( 355)
MT-B-GL O4 US OC
( ASTM A1011 /
ASTM A1018) 1
HSLAS-F Grade
50 MOD 1
51.49
( 355)
F u, ksi( MPa) 68.17( 470) 68.17( 470)
1 ASTM A1011 / ASTM A1018 HSLAS Grade 50 MOD is an enhanced version of ASTM A1011 / ASTM A1018 HSLAS Grade 50 with Fu >= 470MPa and Fy >= 355MPa.
Corrosion Protection
Description
Environmental Conditions MT-B-GL O4 OC Outdoor, low to moderate pollution( C3 / C4- low) MT-B-GL O4 US OC Outdoor, low to moderate pollution( C3 / C4- low)
Ordering Information
Description
Weight Per Piece, lbs( kg)
Quantity Piece( s)
Item No. MT-B-GL O4 OC 30.86( 14) 1 2272103 MT-B-GL O4 US OC 30.86( 14) 1 2487468
mm( in)
Figure 24 – MT Girder Anchoring to Concrete
Table 150- Allowable Strength Design( ASD) Load Data 1, 2, 3, 4
Fx lb( kN)
Fy lb( kN)
Fz lb( kN)
My lb ft( kN m)
Mz lb ft( kN m)
27,180( 120.9)
12,275( 54.60)
12,275( 54.60)
5,560( 7.54)
5,560( 7.54)
1 Minimum safety factor, Ω, for tabulated values is 2.0.
2 Multiply tabulated values by 1.5 to obtain minimum Load and Resistance Factor Design
( LRFD) values.
3 See Figure 24.
4 Load values are for base connector only. The design professional is responsible for
checking concrete and fastener strength.
Table 151- Limit State Design( LSD) Load Data 1, 2, 3
A. MT-90 / MT 90H
Fx lb( kN)
Fy lb( kN)
Fz lb( kN)
My lb( kN m)
Mz lb( kN m)
38,505( 171.3)
17,375( 77.29)
17,375( 77.29)
7,845( 10.64)
7,845( 10.64)
1 Maximum resistance factor, φ, for tabulated values is 0.75.
2 See Figure 24.
3 Load values are for base connector only. The design professional is responsible for
checking concrete and fastener strength.
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