Special Moment Frames
Applications

No field assembly. No site bolting. No field welding – unless you want to. If you’re designing structures for high wind and seismic loads, there is no better frame. 

Hardy Frame® Special Moment Frame Overview

When to use a Hardy Frame Moment Frame:

  • At large openings where the narrowest wall space is available and high shear loads are required.
  • When foundations are limited or existing and a pinned base connection facilitates foundation design.
  • When designing three story or greater structures, all parallel walls must be designed at the lowest R-Value. Specify a Hardy Frame Special Moment Frame and design at the same R=6.5 as design of plywood shear walls.

Designing for New Construction:

  • Calculate the design shear load based on an R-Value of 6.5.
  • Select a Hardy Frame Moment Frame based on the required geometry from standard tables. 
  • Check that the tabulated Allowable Shear meets the design shear load.
  • If the design shear load exceeds the allowable table value, contact Hardy Frames to determine if an alternate solution, such as a “fixed base” connection will meet the design loads.
  • Calculate the additional vertical loads using the IBC strength design load combinations.
  • Check that additional vertical loads do not exceed the tabulated Allowable Vertical Loads.
  • Calculate the tabulated Column Base Reactions for use in the foundation design.
Moment Frames
Moment Frame Install

Specification:

On the Foundation Plan

  • Specify the Hardy Frame Special Moment Frame model number at the location to be installed.
  • Specify anchorage designation for tension and shear from Hardy Frame Moment Frame Anchorage table in Hardy Frame Moment Frame detail sheets.
  • Specify connection of column base to the foundation (on Nuts & Washers, on Concrete, with Pinned or Fixed Base) refer to Installation Details for connections.

Specification:

On the Framing Plan

  • Specify a connection from the collector (or “drag”) to the top of the Hardy Frame Moment Frame from Installation Details.
  • Consider out of plane bracing for the Frame either through a diaphragm to the beam or with framing members to the columns.

Submittal Documents Provided by MiTek – Hardy Frames

  • A calculation package for the model number specified.
  • Installation Detail Sheets for inclusion as “supplemental plan pages.”

Additional Items:

  • The table values for Allowable Shear Loads assume Pinned Base anchorage.
  • When additional shear load or a drift limit less than the code maximum is needed a Fixed Base design is available. Consult with Hardy Frames to determine fixed base values and options.
  • All allowable shear loads have been adjusted to an R-Value of 6.5. To convert design loads from R=3.5 to R=6.5, multiply the design load by 3.5/6.5.
  • The allowable shear loads are based on a story drift of 0.025h. To convert shear loads to a story drift of 0.020h multiply the table value by a factor of 0.8.
  • When designing lateral resistance for a wall line with varying shear resisting elements the stiffness (drift/allowable shear load) must be proportioned.
  • Two story Moment Frames are available. Fill out the Non-Standard Worksheet at the back of this catalog and submit to Hardy Frame to check the required configuration and loading.