Quality Light Steel Framing Connections and Members
Your Link to the Steel Industry®

CALL US TODAY 1-888-474-4876

MidWall™

MidWall
US Patent #8,387,321
 

MidWall™ is The Steel Network's latest in a long line of enhancements to the metal framing industry, providing a tested alternative in partial wall assemblies.

MidWall is designed to support out-of-plane loading in cantilevered partial wall systems that are unsupported at the top track. The out-of-plane loads are transferred to the floor system through a ½" thick plate nested in the flanges of the member with two ⅜" diameter fasteners (or [one] ½" diameter fastener for 250MW) used for the connection. Available in two lengths, 24" and 48", MidWall may be used in place of standard framing members, or in conjunction with them to frame the wall.

Value

  • Replaces labor/coordination of placing embedded angle into floor system
  • Guide holes for attachment of MidWall to the stud
  • Only certified steel is used
  • 3.625" and 6" Meets IBC criteria Section 1607.7.1 
  • Test data for 2.5" depth MidWall is available
 
Downloads Download Technical data Tech Sheet | Download drawing file DWG | Download specification data Specs | Download BIM data BIM |
Product Information

Material Composition

MidWall: ASTM A1003/A1003M Structural Grade 50 (340) Type H, ST50H (ST340H), 50ksi (340MPa) minimum yield strength, 65ksi (450MPa) minimum tensile strength, G90 (Z275) hot-dipped galvanized coating. Material Thickness = 118mil (10 gauge, 0.1242" design thickness) for 250MW and 362MW. Material Thickness = 97mil (12 gauge, 0.1017" design thickness) for 600 MW.

MidWall Plate: ASTM A36/A36M: 36ksi (250MPa) minimum yield strength, 58-80ksi (400-550MPa) tensile strength, ½" minimum thickness.


MidWall™ 24” Assembly Example

MidWall_24inch_Application

MidWall 24" is generally used in interior half walls of less than 48" in height. Attach MidWall 24" to a 54mil stud with #12 screws through all pre-drilled guide holes. Other studs in the walls are typical infill studs. Maximum spacing between MidWall connectors is 36" o.c.  Contact TSN Technical Services at (888) 474-4876 for design recommendations.

MidWall™ 48” Assembly Example

MidWall48

MidWall 48" is used in interior half walls equal to or more than 48" in height. Use one MidWall 48" as a substitute for a stud at the specified spacing, or attach to a 54 mil stud with #12 screws through all pre-drilled guide holes. Maximum spacing between MidWall connectors is 36" o.c.  Contact TSN for technical support regarding use in exterior or 6" wide walls.
  1. Place MidWall 24" against stud web. Place base plate to anchors through pre-drilled guide holes.
  2. Fasten anchor to floor with specified washers.
  3. Attach MidWall 24" to the stud web with #12 screw fasteners through guide holes (fill all holes in the vertical MidWall leg).

pdf icon Printable Installation Instructions

Order Information
Designation Lbs/Piece Qty/Skid Lbs/Skid
250MW-24 5.63 304 1,711
250MW-48 10.33 152 1,571
362MW-24 7.5 208 1,558
362MW-48 13.5 104 1,404
600MW-24 10.38 160 1,662
600MW-48 18.31 80 1,465

Nomenclature

MidWall™ is currently available in two heights* (24" and 48") and three depths (2.5", 3.625", & 6"). Product nomenclature lists the member depth first followed by the height in inches.

Example: 6" web depth, 24" tall MidWall
Designate: 600MW-24

* Custom lengths available on request.

TSN_MidWall_Dimensions
Wall Width (in) MidWall™ Member Maximum Point Load at 48" (ASD), lbs Maximum Base Moment, lbs-in
2 ½ 250MW 128 6,150
3 ⅝ 362MW 332 15,940
6 600MW 407 19,540

Notes:

  • MidWall is designed to support out-of-plane loading in cantilevered partial wall systems that are unsupported at the top track.
  • Out-of-plane loads are transferred to the floor system through plate nested in the flanges of the member with two ⅜" diameter fasteners (or one ½" diameter fastener for 250MW) used for the connection.
  • MidWall may be used in place of standard framing members, or in conjunction with them to frame the wall.

Criteria
IBC 2009
Refer to Section 1607.7.1

Handrails and Guards:
- 50 lb/ft applied in any direction at the top of wall
- 200 lbs applied in any direction at any point at the top of the wall

Parapets & Ribbon Walls:
-Design Wind Pressure (psf)

Interior Half Walls:
- Design internal pressure

Applications:
- Handrails and Guards
- Interior Half Walls
- Parapets
- Ribbon Windows

MidWall_Design_Information

Design Procedure
The top track spanning between MidWall members acts as a load distribution member capable of distributing localized loads to multiple MidWall members. It is recommended to design the track in these applications. Refer to the diagram at right for an example of the distribution of the point load, P to adjacent MidWall supports.  At the end of the wall, MidWall is required at adjacent stud spacings.  Designed spacing begins after two adjacent end supports.

Max. Applied Tension
in One Anchor (lbs.)
362/600 MidWall™ ⅜” Anchorage Options
(4,000 psi min. concrete strength)
1,500 ⅜” Wedge-Bolt, 3” Embed. (Powers)
⅜” Carbon Steel Kwik Bolt 3 Expansion Anchor, 3 ½” Embed. (Hilti)
2,000 ⅜” Wedge-Bolt, 3 ½” Embed. (Powers)
⅜” HAS-E Standard (ISO 898 Class 5.8) w/ HIT-HY 150 MAX Adhesive, 3 ⅜” Embed. (Hilti)
⅜” ASTM A307 Threaded Rod w/ A7 Adhesive, 3 ⅜” Embed. (Red Head)
2,500 ⅜” Wedge-Bolt, 3 ½” Embed. (Powers)
⅜” HAS-E Standard (ISO 898 Class 5.8) w/ HIT-HY 150 MAX Adhesive, 3 ⅜” Embed. (Hilti)
⅜” ASTM A193 GR. B7 Threaded Rod w/ A7 Adhesive, 3 ⅜” Embed. (Red Head)
3,000 ⅜” HAS SS (AISI 304/316 SS) w/ HIT-HY 150 MAX Adhesive, 3 ⅜” Embed. (Hilti)
 
Max. Applied Tension
in One Anchor (lbs.)
250 MidWall™ ½” Anchorage Options
(4,000 psi minimum concrete strength)
500 ½” Wedge-Bolt, 2” Embed. (Powers)
½” Carbon Steel HUS-H Screw Anchor Mechanical, 2” Embed. (Hilti)
1,000 ½” Wedge-Bolt, 2 ½” Embed. (Powers)
½” Carbon Steel Kwik Bolt 3 Expansion Anchor, 2 ¼” Embed. (Hilti)
½” Trubolt Wedge, 2 ¼” Embed. (Red Head)
1,500

½” Carbon and Stainless Steel Power-Bolt, 2 ½” Embed. (Powers)
½” Carbon Steel Kwik Bolt 3 Expansion Anchor, 3 ½” Embed. (Hilti)

 

 

Download Technical data Download the full Tech Note: Analysis and Design of Moment Resisting Midwall™

TSN's Product Catalogs are an essential resource for the design of cold formed steel. Developed by Engineers, the catalogs contain design data for members, connectors, and fasteners.

MidWallTM and the rest of TSN's Rigid Connection Product Line can be found in the following Catalogs:

 
 
For a full list of our product catalogs, specification sections, inspection checklists, and research reports please click here.