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-T

Description

‘ T’ shaped base plate for channel-to-concrete or channel-to-steel( X-BT / S-BT / F-BT compatible), meant to be installed with a Twist Lock and Twist Lock Bolt.

Material Specifications

Standard 1 Grade 1 F y, ksi( MPa) F u, ksi( MPa)

GB / T 700 Q235 B 34.08( 235) 53.66( 370)

1 Mechanical properties of GB / T 700 Grade Q235 B meet or exceed the mechanical properties of ASTM A1011 SS Grade 33.

Corrosion Protection
Description	Environmental Conditions
MT-B-T	Dry indoor conditions( C1) Indoor with temporary condensation( C2)
MT-B-T OC	Outdoor, low to moderate pollution( C3 / C4- low)

Ordering Information
Description	Weight Per Piece, lbs( kg)	Quantity Piece( s)	Item No.
MT-B-T	1.25( 0.57)	20	2272090

MT-B-T OC 1.25( 0.57) 20 2272092 mm( in)

Figure 12 – MT Concentric Channel Connection

A. MT-30 / 50 / 60 / 40D Figure 13 – MT Eccentric Channel Connection

A. MT-50

Table 126- Allowable Strength Design( ASD) Load Data 1, 2, 3, 4

Fx Fy lb( kN) lb( kN) lb( kN)

1,400 725

225

( 6.24)( 3.23)

( 1.01)

1 Minimum safety factor, Ω, for tabulated values is 3.0. 2 Multiply tabulated values by 1.5 to obtain minimum Load and Resistance

Factor Design( LRFD) values. 3 See Figure 12. 4 Load values are for base connector only. Design professionals are responsible for checking concrete and fastener strength.

Table 127- Limit State Design( LSD) Load Data 1, 2, 3

Fx Fy

lb( kN)	lb( kN)	lb( kN)
1,890	1,005	310
( 8.42)	( 4.49)	( 1.40)
1 Maximum resistance factor, φ, for tabulated values is 0.45.
2 See Figure 12.
3 Load values are for base connector only. Design professionals are
responsible for checking concrete and fastener strength.

Table 128- Allowable Strength Design( ASD) Load Data 1, 2, 3, 4

Fx Fy

lb( kN)	lb( kN)	lb( kN)
1,450	225	725
( 6.46)	( 1.01)	( 3.23)
1 Minimum safety factor, Ω, for tabulated values is 3.0.
2 Multiply tabulated values by 1.5 to obtain LRFD values.
3 See Figure 13.
4 Load values are for base connector only. Design professionals are
responsible for checking concrete and fastener strength.
Table 129- Limit State Design( LSD) Load Data 1, 2, 3

Fx Fy

lb( kN)	lb( kN)	lb( kN)
1,960	310	1,005
( 8.72)	( 1.40)	( 4.49)
1 Maximum resistance factor, φ, for tabulated values is 0.45.
2 See Figure 13.
3 Load values are for base connector only. Design professionals are
responsible for checking concrete and fastener strength.

Modular Supports System Product Technical Guide June 2026 | Page 79