• Codes
  • Features

    Features Overview

    Go to features
    Reference

    Reference.

    A reliable and up-to-date source of codes.
    Research

    Research.

    Rapidly and efficiently calculate project parameters.
    Collaboration

    Collaboration.

    Get everyone on the same page and streamline code research.
    Workflows
    Architects General Contractor Building Official & Plans Examiner Inspectors Owner Subcontractors Code Consultants
  • Pricing
  • Login
  • Sign Up
Sign Up
Login
  • Code Library
  • Features
  • Pricing
  • About
  • Careers
  • Help
  • Contact
  • Terms
  • Privacy
Sign Up
Upgrade to Premium
Code calculators: Code Calculators automatically generates a detailed list of requirements.
REFERENCE
Amendment Styling
Industry-leading search
Suggested code sections
Code diagrams
RESEARCH
Code calculators
Filter by topic
Code compare
Code sheet exports
COLLABORATION
Team projects
Bookmarks
Comments
START 2 WEEK FREE TRIAL
Have an account? Sign in
// CODE SNIPPET

7.4 Precast Concrete Diaphragms

California Administrative Code 2019 > 6 Seismic Evaluation Procedures for Hospital Buildings > 7 Procedures for Diaphragms > 7.4 Precast Concrete Diaphragms
JUMP TO FULL CODE CHAPTER
Evaluation of precast concrete diaphragms and the connections between precast elements shall consider eccentricities, adequacy of welds and length of embedded bars. If a topping slab is provided, it shall be assumed to resist all of the shear.

7.4.1 Topping Slab

Precast concrete diaphragm elements are interconnected by a reinforced concrete topping slab.

The deficiency is in the ability to transfer shear from one element to another. Check the slab element interconnection and check the lateral load capacity of the vertical elements that resist horizontal force. Where the capacity of the diaphragm is less than 150 percent of the sum of the load capacities of the vertical elements and where connections can allow the diaphragm to fail in a brittle manner, the R values used in computing the seismic demand shall be consistent with those for brittle systems (not to exceed R = 2). Conforming buildings without a reinforced concrete topping slab shall be placed in SPC 4.

7.4.2 Continuity of Topping Slab

The topping slab continues uninterrupted through the interior walls and into the exterior walls or is provided with dowels with a total area equal to the topping slab reinforcing.

For conforming buildings, the evaluator may consider this condition as mitigated, and no calculations are necessary. The deficiency is the abrupt loss of strength where the topping slab is interrupted. Evaluate the tension and shear demand due to diaphragm forces, including collector requirements, perpendicular-to-wall loads, or chord forces at re-entrant corners.

Related Code Sections


7.4 Seismic Evaluation Procedures for Hospital Buildings, Precast Concrete Diaphragms
Evaluation of precast concrete diaphragms and the connections between precast elements shall consider eccentricities, adequacy of welds and length ...
California Administrative Code 2019 > 6 Seismic Evaluation Procedures for Hospital Buildings > 7 Procedures for Diaphragms > 7.4 Precast Concrete Diaphragms
7.4 Seismic Evaluation Procedures for Hospital Buildings, Precast Concrete Diaphragms
Evaluation of precast concrete diaphragms and the connections between precast elements shall consider eccentricities, adequacy of welds and length ...
California Administrative Code 2016 > 6 Seismic Evaluation Procedures for Hospital Buildings > 7 Procedures for Diaphragms > 7.4 Precast Concrete Diaphragms
8.3.3 Seismic Evaluation Procedures for Hospital Buildings, Topping Slab to Walls and Frames
Reinforced concrete topping slabs that interconnect the precast concrete diaphragm elements are doweled into the shear wall or frame elements. For ...
California Administrative Code 2019 > 6 Seismic Evaluation Procedures for Hospital Buildings > 8 Procedures for Connections > 8.3 Shear Transfer > 8.3.3 Topping Slab to Walls and Frames
8.3.3 Seismic Evaluation Procedures for Hospital Buildings, Topping Slab to Walls and Frames
Reinforced concrete topping slabs that interconnect the precast concrete diaphragm elements are doweled into the shear wall or frame elements. For ...
California Administrative Code 2016 > 6 Seismic Evaluation Procedures for Hospital Buildings > 8 Procedures for Connections > 8.3 Shear Transfer > 8.3.3 Topping Slab to Walls and Frames
Help Contact Us Privacy Terms
Search
Search
Don't miss relevant code. Quickly locate sections across your jurisdiction.
Code Compare
Code Compare
Highlight differences between any two building codes.
Code diagrams
Code diagrams
Unpack the code through illustrations and descriptions.
Code Calculators
Code Calculators
Code calculators automatically generate a detailed list of requirements.
Code sheet exports
Code sheet exports
Generate a code sheet that integrates with your drawing set.
Shared projects
Shared projects
Projects provide a dedicated space to collaborate on code research.
UpCodes Premium
Leverage the most sophisticated code compliance platform.
TRY FREE FOR TWO WEEKS VISIT PRICING
UpCodes Premium
Leverage the full code compliance platform.
START 2 WEEK FREE TRIAL LEARN MORE