Modular Support Systems Technical Guide , Edition 1
3.0 MODULAR SUPPORT SYSTEM 3.2.2 MT BASE CONNECTORS MT-B-T
Description
2-hole ‘ T ’ base plate 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
Electro-Galvanized ( EG )
MT-B-T
Hot-Dipped Galvanized ( HDG )
MT-B-T OC
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
Figure 7 - MT Concentric Channel Connection
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Table 71 - Allowable Strength Design ( ASD ) Load Data 1 , 2 , 3 , 4
F x lb ( kN )
F y lb ( kN )
F z 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 7 . 4 . Load values are for base connector only . Design professional is responsible for checking concrete and fastener strength .
Table 72 - Limit State Design ( LSD ) Load Data 1 , 2 , 3
A . MT-30 / 50 / 60 / 40D
Figure 8 - MT Eccentric Channel Connection
F x lb ( kN )
F y lb ( kN )
F z 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 7 . 3 . Load values are for base connector only . Design professional is responsible for checking concrete and fastener strength .
Table 73 - Allowable Strength Design ( ASD ) Load Data 1 , 2 , 3 , 4
F x lb ( kN )
F y lb ( kN )
F z 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 minimum Load and Resistance Factor Design
( LRFD ) values . 3 . See Figure 8 . 4 . Load values are for base connector only . Design professional is responsible for checking concrete and fastener strength .
Table 74 - Limit State Design ( LSD ) Load Data 1 , 2 , 3
A . MT-50 |
F x lb ( kN ) |
F y lb ( kN ) |
F z lb ( kN ) |
|
1,960 |
310 |
1,005 |
( 8.72 ) |
( 1.40 ) |
( 4.49 ) |
|
|
2023 |
1 . Maximum resistance factor , Φ , for tabulated values is 0.45 . 2 . See Figure 8 . 3 . Load values are for base connector only . Design professional is responsible for checking concrete and fastener strength . |
55 |