New Millennium Building Systems
Steel Joist Institute, ANSI, Steel Deck Institute Steel Joist Institute ANSI Steel Deck Institute

Design Ideas

New online tools simplify steel deck specification

Steel deck specification tools

Easy-to-follow data entry fields with drop-down data entry eliminate the need to source multiple catalog pages and charts to arrive at a steel deck designation.

Steel deck specification guide

Joining New Millennium's series of online specification “tools” is a new steel deck load table specification tool and a diaphragm design specification tool to help guide specifying engineers to steel deck designations and provide custom design guide PDFs.


The popular look-up tools are located on the New Millennium website. By entering design criteria into an easy-to-follow interface that features pull-downs for data entry, the user is guided to the correct product designation, including the designation that can be the most cost effective, relative to material and labor factors.


For example, to choose the right steel deck designation, the Load Table Tool enables you to enter the design methodology (ASD or LRFD); Deck Application (Roof, Form, or Composite); Deck Type; Gage; and Yield Stress. Standard gage and standard yield stress selections are typically recommended. As noted within the tool, alternate gage and non-standard yield stress selections may result in additional cost and/or additional schedule time required. The impact on both cost and schedule is greater on smaller projects than on larger projects.


Upon submitting these selection criteria, the user is presented with a Steel Deck Design Guide PDF that summarizes the defined criteria and provides related essential information. An extensive library of Steel Deck Design Guide PDFs supports the tool. The downloadable guide pages also provide such guidance as the types and sizes of fasteners.


Test drive the new Steel Deck Load Table Tool


Test drive the new Steel Deck Diaphragm Design Tool



Application Notes

Break the cost chain

Many of the costs generated during the structural steel design phase can be reduced or avoided altogether. This includes both supply-side costs and project-side costs.

Supply-side costs include the warehousing of the steel for the upcoming project, the detailing hours, the manufacturing hours, the number of delivery trucks. Project-side costs include the labor related to on-site staging, erection hours, added work and rework. The added work and rework costs are often covered by contingency fees set aside for this purpose. In effect, many thousands of dollars are built into a project to compensate for insufficient collaboration during the early structural steel design phase, which importantly includes steel joist, deck and beam design.


Back-end contingency fees are a poor substitute for front-end structural steel design collaboration. Proactive engineering during the structural steel design phase can assure that many potentially overlooked cost events do not add up to create an extended project timeline, a delayed move-in date, lost retail revenues and lost occupancy income.

Project cost savings
On this midsized steel project, proactive early design collaboration resulted in a range of supply-side and project-side cost reductions that totaled over $190,000.
AIA / PDH course
Online Credit-Hour Course:
Progressive Steel Joist and Metal Decking Design

This AIA credited course takes a building owner's perspective on the range of cost and performance improvements that are possible when using a more design-analytical and collaborative approach to steel joist and metal decking construction. 1.0 AIA LU credit / 1.0 PDH credit.


Take this AIA / PDH course now.


Did You Know?

NASCC 2014 shows what's new
NASCC 2014 Toronto

The Steel Show in Toronto March 26-28 will unveil a lot that is new in structural steel design, including a new approach to improved roof overload safety, special profile steel joists, and castellated and cellular beams.

Flex-Joist™ system

Flex-Joist™ Gravity Overload Safety System™

The Flex-Joist™ Gravity Overload Safety System™ is an innovative approach to roof overload safety that was recently publicized by the AISC Engineering Journal. This approach exceeds the strength requirements of the Steel Joist Institute (SJI) specifications to provide a joist with increased reliability and ductility at minimal additional cost.


Read more:

Experimental Investigation of Steel Joist Design for Ductile Strength Limit State AISC Engineering Journal –1st Quarter 2014 (pdf)

Special profile joists

Special profile steel joists

Expanded specification tables in the area of special profile steel joist design have enabled engineers to more immediately reach for answers to unique design challenges. Building upon four basic joist profiles – gable, scissor, bowstring, arch – the publication of vastly expanded weight table specifications has eased the way for the evaluation and specification of many thousands more combinations of these profiles.


Download the latest Special Profile Joists catalog.

FreeSpan™ Cellular Beams

Castellated and cellular beams

The broader availability of evolved structural steel products such as composite steel joist systems and castellated steel beams has brought more architectural options to the early design table. An example is the introduction of the FreeSpan™ line of castellated and cellular beams, which has expanded the availability of this novel approach to wide-open, wide-span bay designs, with particular cost and performance advantages over concrete beams.

AIA / PDH course
Online Credit-Hour Course:
Castellated and Cellular Steel Beams

This course provides a thorough introduction to the design, cost and performance advantages of steel castellated and cellular beams. Beam attributes are explained from the perspectives of the architect, engineer, erector, and building owner. 1.0 AIA LU credit / 1.0 PDH credit.


Take this AIA / PDH course now.

Steel Dynamics, Inc

New Millennium Building Systems is a wholly owned subsidiary of Steel Dynamics Inc.