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Industry Axis

Mock-Ups: Worth Their Weight In Gold

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What could make a 72'-6" panel more complicated?  The introduction of a new product.  The iconX composite connectors for insulated panels brought a lot of questions from the tilt-up subcontractor and the general contractor. The project is complex and the panels are very large.  Therefore, the decision to build a mock-up panel was worth its weight in gold.

Prior to the pour, the contractor got hands-on with the iconX composite connector and insulation to develop a marking and handling system to make the project run smoothly. The contractor then studied the sequencing of embeds, welded wire reinforcing mats, miscellaneous rebar placement, iconX connector and insulation installation, concrete placement and finishing and lifting/bracing hardware placement.  

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Needham Presents to Joint SEAKM and CPG Meeting

Jeff Needham will present "Composite Tilt-Up Panels - The Future of Tilt-Up Walls" to CPG & SEAKM members..  The meeting will begin at 4pm with an opportunity for networking followed by the presentation from 4:30 pm to 5:30 pm.  CPG is providing drinks and appetizers to enjoy.

Presentation Summary:The continued adoption of energy codes is pushing tilt-up designers to use more edge to edge  insulated panels. Using the two wythes of these panels working together in composite action is a logical solution for engineers to provide a strong and very efficient insulated panel. The use of composite design has been limited due to thermal bow concerns, lack of good design methods, and limited connector types.This presentation will explore the current state-of-the-art in composite tilt-up panel construction and explain developments in design methods for tilt-up composite panels. The differences between solid panel design and two-wythe composite design will be illustrated and the limitations of current composite design methods will be shown. The future of composite panels in tilt-up construction will conclude the talk.

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UVA Ivy Stacks Underway

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The first tilt-up concrete building on the historic campus of the University of Virginia is now underway. Needham DBS worked with Nielsen Builders to design an insulated, composite tilt-up panel system for the Ivy Stacks Expansion project, an addition to an existing precast building. The panels are over 45’ tall, and feature the innovative IconX Model 23 composite connector (www.iconxusa.com), with edge-to-edge XPS insulation, in a 4 5/8-2-4 5/8 configuration (11 ¼” overall thickness). This design uses 30% less concrete than the comparable non-composite panel design. The site is extremely tight, with very limited panel casting area and narrow crane path. Panels are scheduled to be tilted in mid-December.

Composite Concrete Panels - The Future for Tilt-up Walls?

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As I have watched the tilt-up concrete construction industry develop over many years, I have appreciated the way it has become a preferred method of construction for many building types. This growth has been based on a number of improvements in construction and design technology, such as larger mobile cranes, the recognition and adoption of slender wall design in building codes, and a growing appreciation for the flexibility and speed of tilt-up methods. The widespread adoption of the International Energy Conservation Code (IECC) embraces the tilt-up industry, which already provides a fully code-compliant panel. The industry has the potential to make these panels more structurally efficient through the use of composite panels. This is a huge opportunity many designers and contractors may be missing.

To view the entire article published in the Summer 2017 Issue of Tilt-Up Today Magazine, visit http://tilt-up.org/tilt-uptoday/2017/08/08/composite-concrete-panels-the-future-for-tilt-up-walls/

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Tilt-Up Convention & Expo - Miami

The TCA announed today that the Tilt-Up Convention & Expo in Miami will continue as scheduled.  The hotel and convention center in Miami suffered some landscape damage but otherwise withstood the sustained winds and storm surge from Hurricane Irma.  The Miami airport is reopening today and travel will be back to normal by the time of the convention.  The convention will begin on Thursday, September 28.

Jeff Needham will be presenting "Structural Design of Composite Tilt-Up Panels" on Saturday, September 30.  

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