HPKM Column Shoes are available in several standard models to enable most types of precast concrete column connection. The column connection system consists of: Column shoes, Anchor bolts, Accessories: recess formers and installation templates.
HPKM Column Shoes are used with HPM® Rebar Anchor Bolts to make moment-resisting precast concrete column connections. The connection can be designed to be at least as stiff as a continuously reinforced cast in place connection. The column shoes are cast into the bottom part of the column together with the main and supplementary reinforcement as detailed in Annex A of this manual. HPM Rebar Anchor Bolts are either cast into the foundations (column-to-foundation connection) or in the top part of the lower column (column.to-column connection). Column shoes have a round hole that fits with the corresponding anchor bolt. The column connection is achieved by fastening the anchor bolts to column shoes using nuts and washers. The bolted connection offers sufficient assembly tolerances to adjust the column to the correct height and vertical position. To finalize the connection, the joint underneath the column is a routed with non-shrink grout material as are the recesses
Functionality:
HPKM® Column Shoes are construction products used to create cost-effective, moment-resisting, stiff connections between precast concrete columns and foundations, or between precast concrete columns. The bolted column shoes’ connection is at least as rigid as a continuously reinforced cast in place column connection. HPKM® Column Shoes are used together with HPM® Rebar Anchor Bolts.
The Column Connection is made by the Column Shoes and the Anchor Bolts. The Column Shoes are casted into precast concrete columns, while Anchor Bolts are casted into the foundation or another column (columns’ splice). On the construction site the columns are erected on the Anchor Bolts, adjusted to the correct level and vertical position. Fixing is achieved by tightening nuts on the Anchor Bolts. The joint between column and structure below should be grouted before loading the column. After grout is hardened, the joint works as reinforced concrete structure.
Applications:
HPM Rebar Anchor Bolt: HPM Rebar Anchor Bolts are used with HPKM Column Shoes and SUMO Wall Shoes to create fast and safe connections between precast elements. Anchor Bolts transfer the compression and tension forces through a combination of headed studs and the bond of the ribs of ribbed bars.
Column Shoe Casting Box: Casting Boxes are used together with Column Shoes at the manufacturing stage. Casting Boxes create recesses of the correct size for using anchor bolts.
Advantages:
HPKM® Column Shoes provide a high-performance solution for connecting precast concrete columns either to foundations or to other precast columns in multi-story structures. These engineered connections deliver immediate stability by creating rigid, moment-resistant joints when paired with HPM® Anchor Bolts or COPRA® Anchoring Couplers, ensuring structural integrity from the moment of installation.
The system’s design features column shoes that are precision-cast into the precast concrete columns during manufacturing, while the anchor bolts are embedded either in the foundation （for base connections） or in the lower column (for column-to-column splices). During on-site assembly, columns are securely positioned onto the anchor bolts, with their alignment fine-tuned to exact level and plumb specifications simply by tightening the connection nuts.
To complete the installation, the interface between the column and supporting structure is filled with high-strength, non-shrink grout. Once cured, this grouted joint achieves full composite action, performing identically to a conventional cast-in-place reinforced concrete connection in terms of load transfer and structural behavior.
