Modular Support Systems Technical Guide , Edition 1
3.0 MODULAR SUPPORT SYSTEM 3.2.2 MT BASE CONNECTORS MT-B-GXL S1 OC
Description
Base plate for fixation of MT-90 and MT-100 girder structures to 3.1 " -6.9" steel flange widths ( X-BT / S-BT / F-BT compatible ). Material Specifications
Standard 1 Grade 1 F y , ksi ( MPa ) F u
, ksi ( MPa ) GB / T 1591 Q355 B 51.49 ( 355 ) 68.17 ( 470 )
1 . Mechanical properties of GB / T 1591 Grade Q355 B meet or exceed the mechanical properties of ASTM A1011 SS Grade 50 .
Corrosion Protection
Hot-Dipped Galvanized ( HDG )
MT-B-GXL S1 OC
Ordering Information
Description
Weight Per Piece lbs ( kg )
Quantity Piece ( s )
Item No . MT-B-GXL S1 OC 20.72 ( 9.4 ) 2 2272106
Figure 18 - MT Girder Sandwiched to Steel
MT-P-G-S1
A . MT-90 / 100
Figure 19 - MT Girder Clamped to Steel
MI-SGC-M16 ( 4 total )
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Table 93 - Allowable Strength Design ( ASD ) Load Data 1 , 2 , 3 , 4 , 5
F x lb ( kN )
F y
5 lb ( kN )
F z
5 lb ( kN )
M y lb ft ( kN m )
M z lb ft ( kN m )
16,790 |
3,345 |
3,345 |
4,835 |
2,445 |
( 74.7 ) |
( 14.9 ) |
( 14.9 ) |
( 6.56 ) |
( 3.32 ) |
1 . Minimum safety factor , Ω , for tabulated values is 2.1 . 2 . Multiply tabulated values by 1.5 to obtain minimum Load and Resistance Factor Design
( LRFD ) values . 3 . Tabulated values require that minimum grade 8.8 threaded rods must be used . 4 . Tabulated values are for assembly shown in Figure 18 . Design Professional is responsible for checking strength of supporting steel member . 5 . Tabulated values are based on friction that is provided mechanically and not due to gravity loads .
Table 94 - Limit State Design ( LSD ) Load Data 1 , 2 , 3 , 4
F x lb ( kN )
Table 95 - Allowable Strength Design ( ASD ) Load Data 1 , 2 , 3 , 4
F x lb ( kN )
F y
4 lb ( kN )
F y
4 lb ( kN ) mm ( in )
F z
4 lb ( kN )
F z
4 lb ( kN )
M y lb ft ( kN m )
M y lb ft ( kN m )
M z lb ft ( kN m )
25,170 |
5,035 |
5,035 |
6,290 |
3,670 |
( 112.0 ) |
( 22.4 ) |
( 22.4 ) |
( 8.53 ) |
( 4.98 ) |
1 . Maximum resistance factor , Φ , for tabulated values is 0.7 . 2 . Tabulated values require that minimum grade 8.8 threaded rods must be used . 3 . Tabulated values are for assembly shown in Figure 18 . Design Professional is responsible for checking strength of supporting steel member . 4 . Tabulated values are based on friction that is provided mechanically and not due to gravity loads .
M z lb ft ( kN m )
14,380 |
1,545 |
1,545 |
4,835 |
2,100 |
( 64.0 ) |
( 6.88 ) |
( 6.88 ) |
( 6.56 ) |
( 2.85 ) |
1 . Minimum safety factor , Ω , for tabulated values is 2.3 . 2 . Multiply tabulated values by 1.5 to obtain minimum Load and Resistance Factor Design
( LRFD ) values . 3 . Tabulated values are for assembly shown in Figure 19 . Design Professional is responsible for checking strength of supporting steel member . 4 . Tabulated values are based on friction that is provided mechanically and not due to gravity loads .
Table 96 - Limit State Design ( LSD ) Load Data 1 , 2 , 3
2023
A . MT-90 / 100
F x lb ( kN )
F y
3 lb ( kN )
F z
3 lb ( kN )
M y lb ft ( kN m )
M z lb ft ( kN m )
21,580 |
2,315 |
2,315 |
6,290 |
3,145 |
( 96.0 ) |
( 10.3 ) |
( 10.3 ) |
( 8.53 ) |
( 4.27 ) |
1 . Maximum resistance factor , Φ , for tabulated values is 0.6 . 2 . Tabulated values are for assembly shown in Figure 19 . Design Professional is responsible for checking strength of supporting steel member . 3 . Tabulated values are based on friction that is provided mechanically and not due to gravity loads .
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