Modular Support Systems Technical Guide, Edition 2
3.0 Modular Support System
3.2.2 MT Base Connectors
MT-B-GXL S3 OC
Description
Base plate for fixation of MT-90 / MT 90H / MT-100 girder structures to 9.1”-12.8” steel flange widths. Slotted holes for spatial adjustments.
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
Description
Environmental Conditions MT-B-GXL S3 OC Outdoor, low to moderate pollution( C3 / C4- low)
Ordering Information
Weight Per Description
Piece, lbs( kg)
Quantity Piece( s)
Item No. MT-B-GXL S3 OC 23.81( 10.8) 2 2272108 mm( in)
Figure 30 – MT Girder Sandwiched to Steel
Table 162- Allowable Strength Design( ASD) Load Data 1, 2, 3, 4, 5
Fx Fy
Fz lb( kN) lb( kN) lb( kN) lb ft( kN m) lb ft( kN m) 8,435
3,345 3,345
3,700 4,455
( 37.52)( 14.9)( 14.9)
( 5.02)
( 6.04)
1 Minimum safety factor, Ω, for tabulated values is 2.0. 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 30. 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 163- Limit State Design( LSD) Load Data 1, 2, 3, 4
My
Mz
A. MT-90 / 90H / 100
Figure 31 – MT Girder Clamped to Steel
A. MT-90 / 90H / 100
Fx lb( kN) |
Fy lb( kN) |
Fz lb( kN) |
My lb ft( kN m) |
Mz lb ft( kN m) |
12,650( 56.28) |
5,035( 22.4) |
5,035( 22.4) |
5,240( 7.11) |
6,310( 8.56) |
1 Maximum resistance factor, φ, for tabulated values is 0.75. |
2 Tabulated values require that minimum grade 8.8 threaded rods must be used. |
3 Tabulated values are for assembly shown in Figure 30. 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 164- Allowable Strength Design( ASD) Load Data 1, 2, 3, 4
Fx lb( kN) |
Fy lb( kN) |
Fz lb( kN) |
My lb ft( kN m) |
Mz lb ft( kN m) |
8,440( 37.54) |
1,545( 6.88) |
1,545( 6.88) |
3,655( 4.96) |
4,450( 6.04) |
1 Minimum safety factor, Ω, for tabulated values is 2.0. |
2 Multiply tabulated values by 1.5 to obtain minimum values. |
3 Tabulated values are for assembly shown in Figure 31. 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 165- Limit State Design( LSD) Load Data 1, 2
Fx lb( kN) |
Fy lb( kN) |
Fz lb( kN) |
My lb ft( kN m) |
Mz lb ft( kN m) |
12,650( 56.28) |
2,315( 10.3) |
2,315( 10.3) |
5,240( 7.11) |
6,310( 8.56) |
1 Maximum resistance factor, φ, for tabulated values is 0.75. |
2 Tabulated values are for assembly shown in Figure 31. 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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