Modular Supports System Product Technical Guide June 2026

Modular Support Systems Technical Guide, Edition 2

3.0 Modular Support System

3.2.2 MT Base Connectors

MT-B-GXL O4 OC

Description

4-hole base plate for MT-100 girder structures to concrete. Meant to be installed with the Hilti Thread Forming Bolt.

Material Specifications

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

F u, ksi( MPa) 68.17( 470) 68.17( 470)

MT-B-GXL O4 OC Outdoor, low to moderate pollution( C3 / C4- low) MT-B-GXL 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-GXL O4 OC 30.86( 14) 1 2272104 MT-B-GXL O4 US OC 30.86( 14) 1 2487479

mm( in)

Figure 25 – MT Girder Anchoring to Concrete

Table 152- 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)
32,370( 144.00)	19,470( 86.63)	20,750( 92.32)	13,055( 17.70)	8,640( 11.72)
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 25.
4 Load values are for base connector only. The design professional is responsible for
checking concrete and fastener strength.

Table 153- Limit State Design( LSD) Load Data 1, 2, 3

A. MT-100

Fx lb( kN)	Fy lb( kN)	Fz lb( kN)	My lb ft( kN m)	Mz lb ft( kN m)
45,860( 204.0)	27,580( 122.7)	29,380( 130.7)	16,980( 23.02)	11,240( 15.24)
1 Maximum resistance factor, φ, for tabulated values is 0.70.
2 See Figure 25.
3 Load values are for base connector only. The design professional is responsible for
checking concrete and fastener strength.

Modular Supports System Product Technical Guide June 2026 | Page 89