The ACI 347R-14: Guide to Formwork for Concrete is a primary industry standard that outlines responsibilities and best practices for the safe and economical design and construction of formwork. It prioritizes three main objectives: safety, quality, and economy. Key Feature Overview
The guide provides comprehensive guidance for both engineers and contractors across several critical areas:
Design Criteria: It establishes standards for horizontal and vertical loads, including updated lateral pressure provisions for newly placed concrete and clarified wind load magnitudes.
Safety & Stability: The document includes detailed safety factors for formwork accessories and specific requirements for shoring, reshoring, and lateral bracing to prevent structural failure.
Contractual Guidance: It defines the information that should be included in contract documents by the engineer/architect to ensure the contractor has sufficient data to design effective formwork.
Material Standards: Updated chapters reflect modern material design specifications for wood, steel, and other formwork materials.
Special Construction: Dedicated sections cover complex scenarios like architectural concrete, bridges, mass concrete, underground work, and special methods such as slipforming and tremie concrete. Document Structure
The guide is organized into chapters that address the lifecycle of formwork operations: Guide to Formwork for Concrete aci 347r14 guide to formwork for concrete pdf
The ACI 347R-14 Guide to Formwork for Concrete provides industry-standard recommendations for the safe, efficient design and construction of formwork, focusing on structural loads, materials, and workmanship. It outlines responsibilities for contractors, including adherence to safety regulations and specified tolerances for concrete quality. For more details, visit Guide to Formwork for Concrete
Formwork Design and Construction
The formwork system should be designed to support all loads that will be imposed on it during construction. The primary loads to be considered are:
The formwork design should also consider the following factors:
Concrete pressure: The pressure exerted by the concrete on the formwork, which can be calculated using the following equation: $$P = \gamma h$$ where $P$ is the concrete pressure, $\gamma$ is the unit weight of the concrete, and $h$ is the height of the concrete.
Formwork stability: The formwork should be designed to resist overturning, sliding, and buckling.
Formwork Materials
The guide provides information on the materials that can be used for formwork, including:
Formwork Construction and Safety
The guide emphasizes the importance of proper formwork construction and safety practices, including:
You can download the ACI 347R-14 guide from the American Concrete Institute (ACI) website or other online sources.
ACI 347R-14, "Guide to Formwork for Concrete," provides comprehensive, industry-standard recommendations for the design, construction, and materials of concrete formwork to ensure safety, quality, and economy. The guide outlines key requirements for design loads, safety, and specialized applications such as slipforming and architectural concrete. Purchase the full document or view the preview at the ACI Store.
ACI 347R-14: Guide to Formwork for Concrete is the industry-standard document for the safe and economical construction of temporary structures used to shape fresh concrete. This essay explores its foundational principles, design requirements, and the collaborative roles it defines for construction professionals. The Role of Formwork in Modern Construction
Formwork is a temporary structure designed to contain poured concrete, molding it to precise dimensions and supporting it until it achieves self-supporting strength. Often accounting for more than half The ACI 347R-14: Guide to Formwork for Concrete
of the total cost of a concrete structure, formwork is a significant financial investment that demands meticulous planning. The ACI 347R-14
serves as a primary reference for balancing three critical objectives: safety, quality, and economy Core Design and Technical Requirements
To be effective, formwork must be rigid, properly braced, and strong enough to withstand both dead and live loads. The ACI 347R-14 provides specific design criteria, including: Formwork - The Concrete Centre
Unlike a strict code, this document is a guide (hence the "R" for "Report"). It provides recommended practices rather than mandatory requirements, though many building codes reference it as a standard of care.
A significant portion of the document is dedicated to vertical support systems (shoring). It defines the critical distinction between:
The guide outlines calculation methods to ensure that the construction loads placed on a newly poured slab (via reshoring) do not exceed the slab’s early-age structural capacity.
The guide evaluates various materials used in formwork: Dead load : The weight of the formwork