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
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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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