The 2018 National Design Specification (NDS) for Wood Construction was developed by the American Wood Council's (AWC) Wood Design Standards Committee and has been approved by ANSI as an American National Standard. The 2018 NDS is referenced in the 2018 International Building Code. Significant additions to the 2018 NDS include new Roof Sheathing Ring Shank nails and fastener head pull-through design provisions to address increased wind loads in ASCE 7-16 Minimum Design Loads and Associated Criteria for Buildings and Other Structures. Purchased copy includes integral commentary.
Purchase of the 2018 NDS includes the 2018 NDS Supplement and the 2015 SDPWS.
Design provisions in the NDS are integral with design values in the NDS Supplement. As such, it is not appropriate to mix design values and provisions from different editions of the NDS. The NDS Supplement contains design values for sawn lumber, structural glued laminated timber, and round timber poles and piles.
The ANSI/AWC 2015 Special Design Provisions for Wind and Seismic (SDPWS) provides criteria for proportioning, designing, and detailing engineered wood systems, members, and connections in lateral force resisting systems. Engineered design of wood structures to resist wind or seismic forces is either by allowable stress design (ASD) or load and resistance factor design (LRFD). Nominal shear capacities of diaphragms and shear walls are provided for reference assemblies. Purchased copy includes integral commentary.
The following publications are available separately from, but compliment, the 2018 NDS and 2018 NDS Supplement.
(Available only in Electronic Format)
The 2018 Manual for Engineered Wood Construction contains design information for structural lumber, glued laminated timber, structural-use panels, shear walls and diaphragms, poles and piles, I-joists, structural composite lumber, cross-laminated timber, and over 40 details are included in the chapter on connections. The Manual provides design information on structural applications of most wood-based products and their connections that meet the requirements of the referenced standards. The Manual is a dual format document incorporating design provisions for both allowable stress design (ASD) and load and resistance factor design (LRFD). Each product chapter contains information for use with this Manual and the National Design Specification® (NDS®) for Wood Construction. Chapters are organized to parallel the chapter format of the NDS.
2015/2018 Structural Wood Design Examples is intended to aid instruction in structural design of wood structures using both Allowable Stress Design (ASD) and Load and Resistance Factor Design (LRFD). It contains over 20 design examples and complete solutions for wood member design, connections, and shear walls. Solutions have been developed based on the 2015 and 2018 National Design Specification®(NDS®) for Wood Construction, and the 2015 Special Design Provisions for Wind and Seismic (SDPWS), as appropriate. References are also made to the 2015 and 2018 Wood Frame Construction Manual (WFCM) for One- and Two- Family Dwellings.
Errata and addendums that have been developed for AWC documents are available here in PDF format.
The 2018 International Building Code (IBC) published by the International Code Council and the National Design Specification® (NDS) for Wood Construction published by the American Wood Council are both now available. This presentation will provide an overview of the significant changes to wood design and construction provisions relative to previous editions and include design examples. Most of the changes in the NDS are a result of the adoption of the ASCE/SEI Standard 7-16 Minimum Design Loads and Associated Criteria for Buildings and Other Structures which includes increased wind loads. Level: Intermediate Primary Audience: Engineers, Code Officials
Learning Objectives
Equivalencies: 2.0 Hour of Instruction = 0.2 Continuing Education Units (CEU) = 2.0 Professional Development Hours (PDH) = 2.0 Learning Units (LU)
The addition of cross-laminated timber (CLT) to AWC’s National Design Specification® (NDS®) and upcoming changes in the 2021 International Building Code (IBC) has given engineers exciting design options never before available in US building codes and standards. New provisions were introduced for CLT connection design in the 2015 edition of the NDS and clarified in the 2018 edition. This presentation will provide background on relevant NDS provisions governing structural design of connections for CLT members, present a design example, and discuss fire protection requirements specified in NDS and AWC’s newly updated Technical Report 10 – Calculating the Fire Resistance of Wood Members and Assemblies (TR10). Level: Advanced Primary Audience: Engineers, Code Officials
Learning Objectives:
Equivalencies: 1 Hour of Instruction = 0.1 Continuing Education Units (CEU) = 1 Professional Development Hours (PDH) = 1 Learning Units (LU)
This presentation will provide an overview of the significant changes for wood design per AWC's National Design Specification® (NDS) for Wood Construction. The 2018 NDS is referenced in the 2018 International Building Code and 2018 International Residential Code and used to design wood structures worldwide. The 2018 NDS references ASCE/SEI Standard 7-16 Minimum Design Loads and Associated Criteria for Buildings and Other Structures which includes increased wind loads. Participants will learn about changes in the 2018 NDS to address increased wind loads and gain an overview of the standard. Level: Beginner Primary Audience: Engineers, Code Officials
Equivalencies: 1.0 Hour of Instruction = 0.1 Continuing Education Units (CEU) = 1 Professional Development Hour (PDH) = 1 Learning Unit (LU)
AWC's 2018 National Design Specification® (NDS®) for Wood Construction is referenced in US building codes and used to design wood structures worldwide. This article will highlight the changes in the 2018 NDS and 2018 NDS Supplement relative to previous editions and provide an overview of the standard. Level: Beginner Primary Audience: Engineers, Code Officials
Equivalencies: 1.0 Hours of Instruction = 0.1 Continuing Education Units (CEU) = 1 Professional Development Hours (PDH) = 1 Learning Units (LU)