• 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
    Architects
    General Contractors
    General Contractors
    Building Official & Plans Examiners
    Building Official & Plans Examiners
    Inspectors
    Inspectors
    Owners
    Owners
    Subcontractors
    Subcontractors
    Code Consultants
    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
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

1810.3.9.4.2 Seismic Reinforcement in Seismic Design Categories D Through F

Building Code 2018 of Illinois > 18 Soils and Foundations > 1810 Deep Foundations > 1810.3 Design and Detailing > 1810.3.9 Cast-In-Place Deep Foundations > 1810.3.9.4 Seismic Reinforcement > 1810.3.9.4.2 Seismic Reinforcement in Seismic Design Categories D Through F
JUMP TO FULL CODE CHAPTER
For structures assigned to Seismic Design Category D, E or F, cast-in-place deep foundation elements shall be reinforced as specified in this section. Reinforcement shall be provided where required by analysis.
Not fewer than four longitudinal bars, with a minimum longitudinal reinforcement ratio of 0.005, shall be provided throughout the minimum reinforced length of the element as defined in this section starting at the top of the element. The minimum reinforced length of the element shall be taken as the greatest of the following:
  1. One-half of the element length.
  2. A distance of 10 feet (3048 mm).
  3. Three times the least element dimension.
  4. The distance from the top of the element to the point where the design cracking moment determined in accordance with Section 1810.3.9.1 exceeds the required moment strength determined using the load combinations of Section 1605.2.
Transverse reinforcement shall consist of closed ties or spirals not smaller than No. 3 bars for elements with a least dimension up to 20 inches (508 mm), and No. 4 bars for larger elements. Throughout the remainder of the reinforced length outside the regions with transverse confinement reinforcement, as specified in Section 1810.3.9.4.2.1 or 1810.3.9.4.2.2, the spacing of transverse reinforcement shall not exceed the least of the following:
  1. 12 longitudinal bar diameters.
  2. One-half the least dimension of the element.
  3. 12 inches (305 mm).
Exceptions:
  1. The requirements of this section shall not apply to concrete cast in structural steel pipes or tubes.
  2. A spiral-welded metal casing of a thickness not less than manufacturer's standard No. 14 gage (0.068 inch) is permitted to provide concrete confinement in lieu of the closed ties or spirals. Where used as such, the metal casing shall be protected against possible deleterious action due to soil constituents, changing water levels or other factors indicated by boring records of site conditions.

1810.3.9.4.2.1 Site Classes A Through D

For Site Class A, B, C or D sites, transverse confinement reinforcement shall be provided in the element in accordance with Sections 18.7.5.2, 18.7.5.3 and 18.7.5.4 of ACI 318 within three times the least element dimension of the bottom of the pile cap. A transverse spiral reinforcement ratio of not less than one-half of that required in Table 18.10.6.4(f) of ACI 318 shall be permitted.

1810.3.9.4.2.2 Site Classes E and F

For Site Class E or F sites, transverse confinement reinforcement shall be provided in the element in accordance with Sections 18.7.5.2, 18.7.5.3 and 18.7.5.4 of ACI 318 within seven times the least element dimension of the pile cap and within seven times the least element dimension of the interfaces of strata that are hard or stiff and strata that are liquefiable or are composed of soft- to medium-stiff clay.

Related Code Sections


1810.3.8.3.3 Soils and Foundations, Seismic Reinforcement in Seismic Design Categories D Through F
For structures assigned to Seismic Design Category D, E or F, precast prestressed piles shall have transverse reinforcement in accordance ...
Building Code 2018 of Illinois > 18 Soils and Foundations > 1810 Deep Foundations > 1810.3 Design and Detailing > 1810.3.8 Precast Concrete Piles > 1810.3.8.3 Precast Prestressed Piles > 1810.3.8.3.3 Seismic Reinforcement in Seismic Design Categories D Through F
1810.3.9.4.2 Soils and Foundations, Seismic Reinforcement in Seismic Design Categories D Through F
For structures assigned to Seismic Design Category D, E or F, cast-in-place deep foundation elements shall be reinforced as specified ...
Building Code 2021 of Illinois > 18 Soils and Foundations > 1810 Deep Foundations > 1810.3 Design and Detailing > 1810.3.9 Cast-In-Place Deep Foundations > 1810.3.9.4 Seismic Reinforcement > 1810.3.9.4.2 Seismic Reinforcement in Seismic Design Categories D Through F
1810.3.9.4.2.2 Soils and Foundations, Site Classes E and F
For Site Class E or F sites, transverse confinement reinforcement shall be provided in the element in accordance with Sections 18.7.5.2, 18.7.5.3 ...
Building Code 2018 of Illinois > 18 Soils and Foundations > 1810 Deep Foundations > 1810.3 Design and Detailing > 1810.3.9 Cast-In-Place Deep Foundations > 1810.3.9.4 Seismic Reinforcement > 1810.3.9.4.2 Seismic Reinforcement in Seismic Design Categories D Through F > 1810.3.9.4.2.2 Site Classes E and F
2111.4 Masonry, Seismic Reinforcement
to Seismic Design Category E or F, masonry fireplaces shall be reinforced in accordance with the requirements of Sections 2101 through 2108 ...
Building Code 2021 of Illinois > 21 Masonry > 2111 Masonry Fireplaces > 2111.4 Seismic Reinforcement
2111.4 Masonry, Seismic Reinforcement
to Seismic Design Category E or F, masonry fireplaces shall be reinforced in accordance with the requirements of Sections 2101 through 2108 ...
Building Code 2018 of Illinois > 21 Masonry > 2111 Masonry Fireplaces > 2111.4 Seismic Reinforcement
Help Contact Us Privacy Terms
Search
Search
Don't miss relevant code. Quickly locate sections across your jurisdiction.
Shared projects
Shared projects
Projects provide a dedicated space to collaborate on code research.
Code Compare
Code Compare
Highlight differences between any two building codes.
Code sheet exports
Code sheet exports
Generate a code sheet that integrates with your drawing set.
Code Calculators
Code Calculators
Code calculators automatically generate a detailed list of requirements.
Code diagrams
Code diagrams
Unpack the code through illustrations and descriptions.
UpCodes Premium
Leverage the most sophisticated code compliance platform.
VISIT PRICING
UpCodes Premium
Leverage the full code compliance platform.
START 2 WEEK FREE TRIAL PRICING