). The plate must be thick enough to resist bending between the vertical side plates. Chair Height (

The AISI guide relies on a series of variables to ensure the geometry of the chair is sound: (Top-Plate Width): The width of the plate along the shell.

The critical stress in the top plate occurs between the bolt hole and the free edge. It is modeled as a beam with partially fixed ends. Formula snippet: is the design load and is the plate thickness. Chair Height (

Instead of custom-designing every chair, use AISI formulas to create a pre-validated matrix of 4 to 5 standard chair sizes categorized by bolt diameter (e.g., 1", 1.5", 2"). This drastically slashes engineering drafting time on future projects.

Anchor bolt chairs play a crucial role in ensuring the stability and structural integrity of cold-formed steel framing systems. They help to:

Standard chairs often ignore these checks, leading to sudden, brittle failure of the foundation itself.

AISI E-1 Vol. II, Part VII provides the floor for anchor bolt chair design — but is achieved by going beyond the prescriptive baseline. A better chair is: