Special Inspectors (Part One)-Fabrication and Shipment Cracks in Precast or Prestressed Beams and Columns

Fabrication and Shipment Cracks in Precast or Prestressed Beams and Columns

Pdf Summary

This document is a report on the different types of cracks that can occur in precast or prestressed concrete beams and columns during fabrication and shipment. The report is divided into chapters based on the type of crack. In Chapter 1, the purpose of the report is explained, and it provides a cautionary note that the report may not cover every possible situation and variation in requirements. Chapter 2 contains definitions of terms related to the cracks. Chapter 3 covers cracks in beams, including transverse cracks at the top of beams, horizontal end cracks in the web or flange, vertical and diagonal cracks at the bottom of the member, ledge corner cracks, ledge cracks, and miscellaneous cracks. Chapter 4 covers cracks in columns, including interior corner cracks in corbels, exterior corner cracks or spalls in corbels, horizontal cracks, vertical cracks at ends, and diagonal cracks at ends. For each type of crack, the report provides causes, prevention methods, effects, and repair information. The severity of the cracks can vary, and some cracks may only have cosmetic effects while others can affect the structural integrity of the members. Repair methods include epoxy injection or patching with grout.

Keywords

cracks

precast concrete beams

prestressed concrete beams

fabrication

shipment

transverse cracks

horizontal end cracks

vertical cracks

diagonal cracks

structural integrity