Furthermore, ACI 347-14 emphasizes the importance of the "Formwork Engineer/Architect" or the "Contractor." In the realm of excavation, this translates to the Competent Person designated by OSHA regulations, but elevated to a higher standard of design competency. The document mandates that designs must not only support the loads but must also accommodate the specific sequence of construction. In excavation support, this is vital; the sequence of installing struts and removing soil (top-down vs. bottom-up construction) dictates the stress distribution in the support system. ACI 347-14’s insistence on detailed drawings and specifications ensures that the excavation plan is not merely a sketch in the field, but a vetted engineering document.
Keeping beam depths consistent, even if spans change, allows supporting structures to be placed on a level platform.
The benefits of using ACI 347.14 include: aci 34714 pdf
This is the most referenced section. The guide details minimum design loads for formwork, including:
ACI 347-14 outlines distinct equations for columns and walls. For example, if concrete is discharged rapidly and fills the form before initial set occurs, the pressure is calculated using full hydrostatic head: P=ρghcap P equals rho g h = Lateral pressure = Density of concrete = Acceleration due to gravity = Depth of fluid concrete Furthermore, ACI 347-14 emphasizes the importance of the
ACI 347R-14, "Guide to Formwork for Concrete," is the primary industry standard for designing and constructing concrete formwork with a focus on safety, quality, and economy. It provides comprehensive guidelines for concrete loads, surface quality, and construction methods like slipforming, while defining the responsibilities of the formwork contractor. For more details, visit American Concrete Institute Intertek Inform ACI 347R:2014(R2021) Guide to Formwork for Concrete
ACI 347.14
This document is essential for a wide range of construction professionals. It serves as a critical resource for:
ACI 347.1R-14 coordinates with ACI 318 (Building Code Requirements for Structural Concrete) to dictate when forms can be safely removed based on field-cured cylinder test results. The benefits of using ACI 347
| Chapter | Title | Key Topics Covered | | :--- | :--- | :--- | | 1 | Introduction and Scope | Overview of the guide's purpose and application. | | 2 | Notation and Definitions | Clear definitions of terms and symbols used in formwork. | | 3 | General Considerations | Achieving economy in formwork and preparing contract documents. | | 4 | Design | Loads, member capacities, safety factors for accessories, shoring, bracing, foundations, and settlement. | | 5 | Construction | Safety precautions, construction practices, tolerances, irregularities in formed surfaces, form removal, and shoring/reshoring. | | 6 | Materials | Properties of materials used in formwork, including accessories, coatings, and release agents. | | 7 | Architectural Concrete | Specific considerations for achieving high-quality exposed concrete finishes. | | 8 | Special Structures | Formwork for bridges, thin shells, mass concrete, and underground structures. | | 9 | Special Methods of Construction | Preplaced aggregate concrete, slipforms, permanent forms, prestressed concrete, site precasting, and underwater concrete. | | 10 | References | A list of cited standards and reports. |