Typically, a shear lug(s) is used to transfer large shear forces between a column base and the foundation (See Figure). Anchor rods are generally used to position, level and secure the column base plate. They may be used to transfer smaller shear. Use of standard hole size for bolts, or 1/16” hole clearance, is not practical [...]
ASTM F1554 covers three grades of anchor rods: Grade 36 (248 MPa), Grade 55 (380 MPa) and Grade 105 (724 MPa). The vast majority of anchor rods (as defined in CSA S16-14) are used to position, level and secure base plates for concentrically loaded gravity columns. Note: The expression “anchor rod” has replaced “anchor bolt” in [...]
Clause 25.2 of the CSA S16-14 states that “columns shall be fitted with at least four anchor rods. When four non-colinear anchor rods for erection safety are not feasible, special precautions shall be taken.” The requirement for a minimum of four anchor rods aims to ensure erection safety. The rods should be positioned to provide an [...]