ProRebar in Action at Crimson Steel
aSa ProRebar helps Oklahoma fabricator detail innovative projects for new riverfront recreation complex.
A Gathering Place for Tulsa, a new riverfront recreation complex set to open next spring, will allow visitors to enjoy a lodge, boathouse, sport courts, nature walks, and a large lawn for concerts. One of the park’s main features is a land bridge that allows motorists to traverse the park via tunnels without interrupting the landscape for visitors above. Reinforcing for the 2,300-ton project was provided by aSa customer Crimson Steel Supply.
When future visitors to A Gathering Place for Tulsa — a new riverfront park currently under construction — walk, run, and play among the trees, they may not even notice that cars are zooming from one side of the park to the other below their feet. They certainly won’t know how the complicated curves of the roadway’s tunnel made placing the structure’s rebar a true challenge.
But Scott Morrison knows it all well.
Scott was responsible for detailing the park’s land bridge project. He relied on aSa ProRebar® to help him visualize the structure and place the bars. “The way the structure curved had so many radiuses, I don’t know how I would have done the math to figure it out without ProRebar. But, I knew I could model it and put the rebar in there,” says Scott. He detailed the project for Diamondback Steel, which has since merged with Crimson Steel Supply.
The project consists of a pair of 300-foot tunnels that are covered by recreational space. Deemed land bridges by the designer, the space above the tunnels will be landscaped to block the sights and sounds of cars passing underneath.
Diamondback (later Crimson) shipped the first load of steel in January 2016. The fabricator eventually provided 2,300 tons of rebar for the tunnels. Crimson worked closely with general contractor Crossland Construction on the project. Funded by the George Kaiser Family Foundation, A Gathering Place for Tulsa represents the largest private gift to a public park in U.S. history. The 66-acre recreation complex is set to open in spring 2018.
Scott explains the process he used. “I created a wire frame model as the basis. Using ProRebar tools, I created lines and patterns, then individually placed the bars I needed. It was very complex. Some of the bars had four or five different radiuses,” he says. It took three to four weeks to model the tunnels, and the entire project lasted a year, according to Scott.
Although Building Information Modeling (BIM) was not a requirement for the project, Scott says he definitely benefitted from creating the 3D model. In addition to helping visualize the bars’ placement — the main reason Scott used ProRebar — it also helped in collaborating with the engineer and general contractor. “At one point, the engineer had a problem and didn’t think the bars would fit as detailed. So, I sent him the 3D file to view and he signed off on it,” says Scott. At another point in the process, the general contractor came to Scott’s office, and they looked at the model together to help answer construction questions.
Recognizing the benefits of working in BIM, detailers from Crimson (Diamondback) were among the earliest aSa customers to begin using ProConcrete and ProRebar more than six years ago. Bentley ProConcrete is the base modeling package developed by Bentley Systems with assistance from aSa. ProRebar is an extended version of ProConcrete that includes special tools for fabricators and detailers, such as the ability to take off material from the model and connect to downstream aSa operations modules.
Scott says aSa CAD Consultant Bryan Diana was very helpful when he had questions. “When the software didn’t let me do what I wanted to do, Bryan was able to help me think of a different way to approach things,” he notes.
In addition to the tunnel project, Scott also detailed a cantilever staircase for the park’s Boathouse structure (see our front cover). He explains, “I decided to do it in 3D because the bottom half of the stair has a varying angle, making it extremely difficult to figure all of the different ties needed.”
Scott has been detailing for Diamondback and Crimson for 14 years. Recently, his role shifted, and he now serves as Director of Estimating for the company.
With fabricating locations in Tulsa and Muskogee, Crimson Steel serves the construction market in Oklahoma, Texas, Arkansas, Missouri, Kansas, and Colorado. “Service is what sets us apart. The customer can never ask for too much. We strive to get them what they need in a timely manner,” says Scott, concluding, “We want them to come back for more.” Currently, Crimson Steel is providing reinforcing for several large projects. The new Osage Hotel and Casino in Tulsa is a six-story building with a two-level casino that will require 1,000 tons of rebar. Cross Residence at the University of Oklahoma is a 1,600-ton project that includes student housing and a parking garage.
Scott Morrison of Crimson Steel modeled land bridge tunnels and a Boathouse staircase (top of article) using aSa ProRebar. ProRebar lets you create a model of all the concrete and reinforcing required for a project. From the model, you can then generate 2D details and take off material directly to your aSa database for use by downstream applications.
The 3D Advantage. ProRebar-generated details for A Gathering Place for Tulsa’s land bridge tunnel and Boathouse staircase projects.