Special Inspectors (Part Three)-Session Three Handout

Session Three Handout

Pdf Summary

The document provides training material for a Special Inspector training session on precast concrete structures. The agenda for the training session includes topics such as code requirements, types of precast concrete structures, precast concrete manufacturing, documents required for inspections, condition assessment of precast components, erection of precast structures, preparation of cast-in-place concrete foundations, and connections of precast components.<br /><br />The section on connections explains that they are used to transfer loads, restrain movement, and provide stability, and they can be classified based on the type of force they transfer, such as gravity (bearing) or lateral. Bearing or gravity connections are used to transfer gravity loads through the structure to the foundation system, and force transfer is achieved through contact of component surfaces separated by bearing pads, shims, or grout. Different types of bearing pads are explained, such as unreinforced elastomeric and fiber reinforced elastomeric.<br /><br />Lateral load resisting connections are used to transfer horizontal loads due to wind, seismic activity, earth pressure, impact, or eccentrically placed gravity loads into the main structural system. These connections are typically welded or bolted assemblies. Details are provided on different types of lateral connections, including shear connections and tension connections.<br /><br />The document also covers considerations and inspections for different types of connections, such as proper alignment, clearance, thread engagement, and welding procedures for welded connections, proper material, length, and diameter for bolted connections, and grout mixing and curing procedures for grouted connections.<br /><br />Field adjustments and repairs are also discussed, emphasizing that all adjustments must be directed and approved by the precast engineer or the engineer of record.<br /><br />Overall, the document provides comprehensive information on various aspects of connections in precast concrete structures and serves as a valuable resource for Special Inspectors in the field.

Keywords

Special Inspector

precast concrete structures

code requirements

manufacturing

inspections

erection

connections

bearing pads

lateral connections

field adjustments