MAGNACORE Capacities Instructions
- Product Family MAGNACORE
- Subcategory ELEMENT
- TIP Category DESIGN
- Tags LOAD CAPACITIES, TYPICAL BIT SIZES, TYPICAL STRENGTH
This TIP is intended to demonstrate the order of magnitude capacities that a typical
Magnacore element can withstand, accounting for grout column diameter.
Installation for use:
- 1. Determine the Anticipated Compression and/or Tension Design Load.
- 2. Determine the Soil and Rock Profile.
a. Assess whether the profile will require a clay, cross-cut, or button style bit to efficiently penetrate the soil or rock materials
- 3. Based on the Bit Type, find the corresponding Max Compression Load that is sufficient to withstand the Design Load. Select the Bar to the left on that row as the design bar section.
- 1. Loading conditions such as unbraced length, lateral loads, moments, etc., should be evaluated by a competent person.
- 2. The capacities on this table are dependent on the soils. This table should only be used to make an initial bar selection, and fully designed by a competent person
|Bar Type||Outside Diameter(mm)||Inside Diameter(mm)||MAX. TYPICAL BIT DIAMETER4||MAX. TYPICAL BIT DIAMETER1,2||MAX. TENSION LOAD1,3|
|Clay Bit||Cross Cut||Button||Clay Bit||Cross Cut||Button|
|R32S||32mm||15mm||115mm||100mm||100mm||53 kips||46 kips||46 kips||27 kips|
|T40/20||40mm||20mm||150mm||150mm||130mm||83 kips||83 kips||71 kips||38 kips|
|R38N||38mm||18mm||150mm||150mm||130mm||85 kips||85 kips||73 kips||40 kips|
|T40/16||40mm||16mm||200mm||150mm||130mm||127 kips||91 kips||79 kips||47 kips|
|R51N||51mm||29mm||200mm||175mm||150mm||136 kips||117 kips||100 kips||56 kips|
|T52/26||52mm||26mm||200mm||175mm||150mm||145 kips||125 kips||109 kips||65 kips|
|T76/45||76mm||45mm||200mm||200mm||200mm||211 kips||211 kips||211 kips||135 kips|
- 1. The loads shown here are design loads and are intended to show an approximation of the strength of these materials. These estimates are based on the products that lntech currently supplies, and should not be used for other suppliers’ materials. Maximum test loads, and appropriate material strength reductions should be factored into the full structural capacity design. Do not use this table in lieu of a full structural design, which should be evaluated by a Professional Engineer. There should be a complete a structural design per project and element in accordance with the required design methodology, such as FHWA, PTI, IBC, AASHTO, and/or the methodology prescribed for the project. The loads are also based on a minimum f’c for the grout of 5,000 psi.
- 2. These loads are based on a Test Load Factor of Safety of 2.0 x DL, and a maximum grout column diameters based on the bit diameters shown in the last three columns.
Lower acceptable Test Load Factors of Safety may result in a lesser material section being required for the same strength. The actual structural capacity will be a function of the Magnacore steel bars, any steel casing, and grout column diameter actually used, as prescribed in a full design methodology.
- 3. These loads are based on a Test Load FOS of 2.0 x DL. Lower acceptable Test Load Factors of Safety may result in a lesser material section being required for the same strength. The design will be controlled by the steel section and methodology chosen for design-it is not affected by the bit size or grout column diameter.
- 4. The bit diameters shown here are typical recommended maximums for each type of bar that lntech carries. If a larger bit diameter is desirable for a specific bar size, lntech can obtain larger bit sizes than shown here. These maximums are based on typical industry practice and material stock. There can also be some instances where softer materials allow for larger bit diameters to be used, and instances where dense to hard materials may require a smaller bit diameter be used for penetration. The system will be advanced with energy from the Top of the Hole, which needs to transfer energy through the drill string-sometimes this can control the selection of bit or material size.