CEMP-E
TI 809-02
1 September 1999
CHAPTER 4
CONCRETE STRUCTURE DESIGN REQUIREMENTS
4-1. INTRODUCTION. This chapter prescribes criteria for the design of buildings using cast-
in-place or precast construction with plain, reinforced, or prestressed concrete.
4-2. BASIS FOR DESIGN. The basis for design for buildings and building components
constructed of reinforced concrete, prestressed concrete, or plain concrete will be ACI 318,
"Building Code Requirements for Structural Concrete and Commentary". Additional provisions
for buildings constructed in severe environments, and buildings designed to resist the effects
of accidental explosions (blast-resistant construction) are provided in Chapter 12. In executing
designs in accordance with ACI 318, cognizance will be given to ACI 318R; Portland Cement
Association (PCA) Notes on ACI 318 Building Code Requirements for Reinforced Concrete
with Design Applications, and to ACI standards and committee reports referenced in this
document.
4-3. EARTHQUAKE RESISTANT DESIGN. Concrete structures are to be designed to resist
the effects of earthquake ground motions. The additional requirements of TI 809-04, "Seismic
Design for Buildings" and FEMA 302, "NEHRP Recommended Provisions for the Seismic
Design of New Buildings and Other Structures" will apply.
4-4. DESIGN STRENGTHS. Concrete strengths for various applications and various
exposures are listed in Table 4-1. Use of high strength concrete will be in accordance with ACI
Committee 211 Report, "Guide for Selecting Proportions for High-Strength Concrete with
Portland Cement and Fly Ash," and ACI Committee 363 Report, "State-of-the-Art Report on
High Strength Concrete."
Table 4-1. Minimum Concrete Strength Requirements.
Usage
Minimum Strength
Concrete fills.
15 Mpa (2000 psi)
Encasements for utility lines and ducts.
20 Mpa (2500 psi)
Foundation walls, footings and cast-in-place concrete piles.
25 Mpa (3000 psi)
Slabs on grade.
25 Mpa (3500 psi)
Reinforced concrete buildings
25 Mpa (3000 psi)
Precast members (including architectural and structural members and
30 Mpa (4000 psi)
piles).
Walls or floors subjected to severe exposure (Severe
25 Mpa (3000 psi)
exposure includes extreme heat or cold and exposure
to deicing or other aggressive chemicals.)
4-1
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