SAES-Q-005 28 PDF – Concrete Foundations

This article is about SAES-Q-005 which is about Concrete Foundations at plants and download SAES-Q-005 PDF for Engineers, supervisors and project managers, QCs, QC Supervisors. This is saudi aramco standards of Civil Engineering based on international codes and standards and useful for Civil Construction knowledge to get job as engineers, QC Supervisors and QC managers, Engineering managers and technicians.

SAES-Q-005 28 PDF Download

SAES-Q-005

Concrete Foundations

SAES-Q-005 is a standard that outlines the mandatory requirements for the design and construction of concrete foundations, excluding retaining walls. The design and construction of retaining walls are governed by SAES-Q-009. For heavy machinery foundations, there are additional design and construction requirements specified in SAES-Q-007. Similarly, SAES-L-440 covers additional design and construction requirements specifically for pipeline anchor blocks. These standards provide specific guidelines and criteria for ensuring the proper design and construction of foundations in accordance with Saudi Aramco’s requirements.

Industry Codes and Standards for SAES-Q-005

The following industry codes and standards are relevant to SAES-Q-005:

1. American Concrete Institute (ACI):

• ACI 318: Building Code Requirements for Structural Concrete

1. American Institute of Steel Construction (AISC):

• AISC 303-05: Code of Standard Practice for Steel Buildings and Bridges, March 18, 2005 Edition

1. American Petroleum Institute (API):

• API STD 650: Welded Steel Tanks for Oil Storage

1. American Society of Civil Engineers (ASCE):

• ASCE/SEI 7-05: Minimum Design Loads for Buildings and Other Structures
• SEI/ASCE 37-02: Design Loads on Structures during Construction

These codes and standards provide guidelines, requirements, and best practices for the design and construction of concrete foundations, ensuring compliance with industry standards and promoting structural integrity and safety.

Design of Concrete Foundations

Here are the design requirements for construction of concrete foundations as described in the given section:

4.1 Soils Analysis:

• A geotechnical investigation is required for all new structures and foundations.
• Allowable soil bearing pressures shall be based on the results of the geotechnical investigation, considering total and differential settlements.
• Soil pressures shall be calculated under vertical and lateral loads using load combinations that result in maximum soil pressures.
• The maximum soil pressure should not exceed the applicable allowable value.
• The conventional method should be used for calculating maximum and minimum soil bearing pressure for foundation design (Meyerhof method is not acceptable).
• If allowed in the geotechnical report, the maximum allowable soil pressure may be increased for transient loads like wind, seismic, and hydrotest loads.

4.1.3 Foundations:

• Foundations shall be founded on undisturbed soil or compacted fill and extend at least 600 mm below the existing or finished grade surface, unless a detailed soil investigation indicates otherwise.
• When foundations are supported on compacted fill, the type of fill material and degree of compaction required shall be governed by the geotechnical investigation or SAES-A-114.

4.2 Foundation Stability:

• Foundation stability shall be checked using service load combinations from SAES-M-001, SAES-M-100, ASCE/SEI 7, and/or SEI/ASCE 37.
• For service load combinations including wind loads, the minimum overturning stability ratio shall be 1.5. For foundation design of buildings and open frame structures with a dead load factor of 0.6, the minimum overturning stability ratio shall be 1.0.
• Overturning and sliding caused by earthquake loads shall be checked in accordance with ASCE/SEI 7, Chapters 12 and 15.
• Additional stability checks shall be done for earthquake loads calculated by the “Equivalent Lateral Force Procedure” in ASCE/SEI 7, Section 12.8.5.
• Long-term and differential settlement shall be considered for foundations supporting settlement-sensitive equipment or piping systems.
• Uplift load combinations containing earthquake loads need not include vertical earthquake forces when used to size foundations.
• The minimum factor of safety against sliding for service loads (other than earthquake) shall be 1.5. For foundation design of buildings and open frame structures with a dead load factor of 0.6, the minimum factor of safety against sliding shall be 1.0.
• The coefficient of friction used in computing the safety factor against sliding for cast-in-place foundations shall be 0.40, unless specified otherwise in a detailed soil investigation.
• The minimum factor of safety against buoyancy shall be 1.2 if using actual unfactored service loads.

These requirements ensure that the design and specifications for concrete foundations are adequate for their intended use, considering soil analysis, stability against overturning and sliding, settlement, and other load combinations.

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