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MFSL Anchorage Assembly

MFSL

Ordinary Moment Frame Anchorage

This product's information may differ depending on the category of use. You are currently viewing details related to Ordinary Moment Frame Anchorage. You can also view product information related to the category: Special Moment Frame Anchorage

Simpson Strong-Tie offers the patented pre-engineered MFSL anchorage assembly to make specification and installation of anchorage as simple as possible. The unique shear-lug design provides a complete solution meeting the 2009 and 2012 International Building Code requirements for both tension and shear. These solutions come with pre-installed shear lugs.

MFSL anchorage assemblies are fully assembled and include a template which allows easy positioning and attachment to forms prior to the pour. Inspection is easy since the head is stamped with the "No Equal" (≠) symbol for identification, bolt length, bolt diameter, and optional "H" for high strength (if specified).

Installation

Concrete must be thoroughly vibrated around the shear lug to ensure full consolidation of the concrete around the assembly.

Related Literature

Product Information Table

Strong Frame Ordinary Moment Frame Anchor Kits
Place anchorage assembly prior to placing rebar. Place top of MFSL flush with top of concrete.
Plan View - Slab on Grade
Plan View - Slab on Grade
Plan View - Stemwall/Curb
Plan View - Stemwall/Curb
Section View - Slab on Grade
Section View - Slab on Grade
Section View - Stemwall/Curb
Section View - Stemwall/Curb

Load Tables

Ordinary Moment Frame MFSL Shear Anchorage

Table 2.1: Simplified MFSL Shear Anchorage – Minimum Required End Distance
MFSL Shear Anchorage – Minimum Required End Distance
  1. Anchorage solutions applicable to wind design and seismic design in Seismic Design Category A, B, or C using R ≤ 3.0. For designs based on R = 3.5, see Table 2.3.
  2. See footnotes 2 and 3 of Allowable Load tables for explanation of Maximum Shear and Minimum Shear, and corresponding gravity loads.
  3. Solutions are based on embedment in concrete with minimum f'c = 2,500 psi.
  4. Solutions are based on standard strength MFSL_-__-KT anchorage assembly, except shaded values, where high strength MFSL_-__HS-KT anchorage assembly is required.
  5. Shear lug is included with MFSL anchorage assembly.
  6. End distance is measured from centerline of nearest anchor bolt to edge of concrete.
  7. Outside End Distance and Inside End Distance are shown above.
  8. See Table 2.2 or 2.3 for additional solutions with MFSL anchorage assembly. See Tables 3.1 and 3.2 for solutions with MFAB anchorage assembly.
  9. Anchorage solutions are based on maximum shear and tension reactions resulting from the tabulated allowable shear load applied to the frame in combination with the gravity loads noted. For frames with an applied shear less than the allowable load or with additional uplift, see Table 2.2 or 2.3.
Base Plate Plans
c6
C6
c9
C9
c12
C12
c15
C15
Table 2.2: Detailed MFSL Shear Anchorage – Shear Lug Capacities, lbs. (Wind)
Detailed MFSL Shear Anchorage – Tied Anchor Capacities
  1. Seismic includes designs in all Seismic Design Categories and designs using R ≤ 3.0 or R = 3.5.
  2. Shear lug is included with MFSL anchorage assembly.
  3. End distance is measured from centerline of nearest anchor bolt to edge of concrete.
  4. First load value listed for each column corresponds to pre-installed wood nailer flush with end of concrete (see base plate plans).
  5. Designer may linearly interpolate for end distances between those listed.
  6. LRFD capacities may be obtained by multiplying tabulated values by 1.6 for wind or by dividing tabulated values by 0.7 for seismic.
  7. Solutions are based on standard strength MFSL_-__-KT anchorage assembly, except values, where high strength MFSL_-__HS-KT anchorage assembly is required (see footnote 12). Standard strength MFSL used in place of high stength OMFSL have an allowable shear of 5,110 lbs. for wind and 5,725 lbs. for seismic for C6 columns, and 10,225 lbs. for wind and 11,450 lbs. for seismic for all other column sizes..
  8. 8" stemwall/curb: For wind design and seismic design with R≤3.0, 8-ft tall MF models, 9-ft tall MF912, MF1212, and MF1512, and 10-ft tall MF1212 and MF1512 installed with nailer flush with inside end of curb may not achieve full allowable load and may require additional interior end distance. For seismic designs with R = 3.5, 8-ft, 9-ft, 10-ft, and 12-ft tall MF models, 14-ft tall MF912, MF1212, and MF1512, and 16-ft tall MF1212 and MF1512 installed with nailer flush with inside end of curb may not achieve full allowable load and may require additional interior end distance. Designer to verify. All other MF models achieve full allowable load when installed with nailer flush with inside end of curb.
  9. 10" stemwall/curb: For wind design and seismic design with R≤3.0, MF912-8x8, MF1212-8x9, MF1512-8x9, and 8-ft tall MF612, MF1212, and MF1512 installed with nailer flush with inside end of curb may not achieve full allowable load and may require additional interior end distance. For seismic designs with R = 3.5, MF912-8x12, MF1212-8x14, MF1512-8x14, MF1512-10x14, 8-ft, 9-ft, and 10-ft tall MF models, and 12-ft tall MF1212 and OMF1512 installed with nailer flush with inside end of curb may not achieve full allowable load and may require additional interior end distance. Designer to verify. All other MF models achieve full allowable load when installed with nailer flush with inside end of curb.
  10. See tension anchorage solutions for additional anchorage assembly strength requirements. Use high strength MFSL_-__HS-KT anchorage assembly where required by either shear or tension anchorage.
  11. See tension anchorage solutions.
  12. Solutions are based on standard strength MFSL_-_-KT anchorage assembly, except shaded values, where high strength MFSL_-_HS-KT anchorage assembly is required.
Table 2.3: Detailed MFSL Shear Anchorage – Shear Lug Capacities, lbs. (Seismic)
Detailed MFSL Shear Anchorage – Shear Lug Capacities, lbs. (Seismic)
  1. Seismic includes designs in all Seismic Design Categories and designs using R ≤ 3.0 or R = 3.5.
  2. Shear lug is included with MFSL anchorage assembly.
  3. End distance is measured from centerline of nearest anchor bolt to edge of concrete.
  4. First load value listed for each column corresponds to pre-installed wood nailer flush with end of concrete (see base plate plans).
  5. Designer may linearly interpolate for end distances between those listed.
  6. LRFD capacities may be obtained by multiplying tabulated values by 1.6 for wind or by dividing tabulated values by 0.7 for seismic.
  7. Solutions are based on standard strength MFSL_-__-KT anchorage assembly, except values, where high strength MFSL_-__HS-KT anchorage assembly is required (see footnote 12). Standard strength MFSL used in place of high stength OMFSL have an allowable shear of 5,110 lbs. for wind and 5,725 lbs. for seismic for C6 columns, and 10,225 lbs. for wind and 11,450 lbs. for seismic for all other column sizes..
  8. 8" stemwall/curb: For wind design and seismic design with R≤3.0, 8-ft tall MF models, 9-ft tall MF912, MF1212, and MF1512, and 10-ft tall MF1212 and MF1512 installed with nailer flush with inside end of curb may not achieve full allowable load and may require additional interior end distance. For seismic designs with R = 3.5, 8-ft, 9-ft, 10-ft, and 12-ft tall MF models, 14-ft tall MF912, MF1212, and MF1512, and 16-ft tall MF1212 and MF1512 installed with nailer flush with inside end of curb may not achieve full allowable load and may require additional interior end distance. Designer to verify. All other MF models achieve full allowable load when installed with nailer flush with inside end of curb.
  9. 10" stemwall/curb: For wind design and seismic design with R≤3.0, MF912-8x8, MF1212-8x9, MF1512-8x9, and 8-ft tall MF612, MF1212, and MF1512 installed with nailer flush with inside end of curb may not achieve full allowable load and may require additional interior end distance. For seismic designs with R = 3.5, MF912-8x12, MF1212-8x14, MF1512-8x14, MF1512-10x14, 8-ft, 9-ft, and 10-ft tall MF models, and 12-ft tall MF1212 and OMF1512 installed with nailer flush with inside end of curb may not achieve full allowable load and may require additional interior end distance. Designer to verify. All other MF models achieve full allowable load when installed with nailer flush with inside end of curb.
  10. See tension anchorage solutions for additional anchorage assembly strength requirements. Use high strength MFSL_-__HS-KT anchorage assembly where required by either shear or tension anchorage.
  11. See tension anchorage solutions.
  12. Solutions are based on standard strength MFSL_-_-KT anchorage assembly, except shaded values, where high strength MFSL_-_HS-KT anchorage assembly is required.