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-O2

Description

2-hole base plate intended to be installed with a Twist- Lock and Twist-Lock bolt for channel-to-concrete or channel-to-steel( X-BT / S-BT / F-BT compatible).

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-O2	Dry indoor conditions( C1) Indoor with temporary condensation( C2)
MT-B-O2 OC	Outdoor, low to moderate pollution( C3 / C4- low)

Ordering Information

Description

Weight Per Piece, lbs( kg)

Quantity Piece( s)

Item No. MT-B-O2 2.27( 1.03) 12 2272094 MT-B-O2 OC 2.27( 1.03) 12 2272096 mm( in)

Figure 15 – MT Concentric Channel Connection

Table 132- Allowable Strength Design( ASD) Load Data 1, 2, 3, 4

Fx lb( kN)	Fy lb( kN)	Fz lb( kN)	My lb ft( kN m)
2,105( 9.38)	350( 1.56)	980( 4.36)	720( 0.98)
1 Minimum safety factor, Ω, for tabulated values is 2.35.
2 Multiply tabulated values by 1.5 to obtain minimum Load and Resistance Factor Design
( LRFD) values.
3 See Figure 15.
4 Load values are for base connector only. The design professional is responsible for
checking concrete and fastener strength.

Table 133- Limit State Design( LSD) Load Data 1, 2, 3

MT-30 / 30D / 40D / 50 / 50U / 50D / 50DU / 60 / 60D

Figure 16 – MT Eccentric Channel Connection

Fx lb( kN)	Fy lb( kN)	Fz lb( kN)	My lb ft( kN m)
2,775( 12.35)	490( 2.18)	1,250( 5.57)	925( 1.26)
1 Maximum resistance factor, φ, for tabulated values is 0.55.
2 See Figure 15.
3 Load values are for base connector only. The design professional is responsible for
checking concrete and fastener strength.

Table 134- Allowable Strength Design( ASD) Load Data 1, 2, 3, 4

Fx lb( kN)	Fy lb( kN)	Fz lb( kN)	My lb ft( kN m)
2,105( 9.38)	350( 1.56)	240( 1.08)	255( 0.35
1 Minimum safety factor, Ω, for tabulated values is 2.6.
2 Multiply tabulated values by 1.5 to obtain minimum LRFD values.
3 See Figure 16.
4 Load values are for base connector only. The design professional is responsible for
checking concrete and fastener strength.

Table 135- Limit State Design( LSD) Load Data 1, 2, 3

A. MT-30 / 50 / 50 U

Fx lb( kN)	Fy lb( kN)	Fz lb( kN)	My lb ft( kN m)
2,660( 11.85)	490( 2.18)	310( 1.40)	335( 0.46)
1 Maximum resistance factor, φ, for tabulated values is 0.5.
2 See Figure 16.
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 81