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Tilt-up Construction - the Complete Article

Workers help to guide a large mobile crane as it lifts a tilt-up panel into place on this Fort Worth, Texas warehouse building project.

Have you ever driven past a construction site and seen massive cranes lifting huge panels of concrete in the air? Have you watched with amazement as a new commercial building seems to spring into place, almost overnight? What you have witnessed is tilt-up construction, an innovative method for building office buildings, retail centers, warehouses, distribution centers, call centers, manufacturing facilities and other commercial / industrial structures with amazing speed, safety, and cost benefits.

So what is the difference between tilt-up and other types of construction?

In traditional forms of wall construction, the walls can be built with CMU blocks or blocks faced with brick. For some types of buildings, the exterior wall is made up of structural steel columns with heavy gauge metal studs covered with gyp sheathing, which is then faced with brick or stucco. Regardless which traditional approach is used, building the exterior walls is a time-consuming, multi-stepped process. A tiltwall building's walls are created horizontally in large slabs of concrete called panels. The panels are then lifted, or tilted up, into position around the building's slab. This means the tilt-up structure's exterior wall is virtually finished when it is tilted into place.

Tilt-up construction (also called tiltwall or tilt wall construction) has a long history, but its widespread use is a relatively new phenomenon. In spite of this, tiltwall construction is fast becoming the method of choice for constructing modern warehouses, call centers, distribution centers, retail stores, office and storage buildings and other types of industrial and commercial facilities.

Tilt-up Construction: An Old Idea With New Innovations

Workers help to guide a large mobile crane as it lifts a tilt-up panel into place on this Fort Worth, Texas warehouse tiltwall building project.
Workers help to guide a large mobile crane as it lifts a tilt-up panel into place on this Fort Worth, Texas warehouse building project.
The basic principle behind tilt-up construction - constructing walls horizontally, on the ground, and then lifting them into place - is not a new idea. Evidence exists that some buildings constructed during the Roman Empire and the Middle Ages used this approach. More recently, American settlers in the 1800s gathered for "barn raisings" where they constructed the wood walls for their buildings and tipped them up into place.

The 20th century marked the true beginnings of modern tiltwall construction. The development of concrete reinforced with rebar in the early 1900s allows builders to create tilt-up commercial structures as we think of them today: One- to two-story structures built with walls comparable in width to those created with other methods of construction.

Even with this innovation, tilt-up construction did not gain wide acceptance until after World War II, when the mobile crane was first developed. The mobile crane allowed builders far greater ability to lift the massive panels into place, regardless where the job site happened to be. At about this time, ready-mix concrete was introduced to the industry, making tilt-up an even more viable alternative.

These new technologies occurred at precisely the right time. The late 1940s brought about a post-war boom in the construction of manufacturing and industrial facilities across the United States. Innovation, timing, and the need for large, warehouse-styled buildings opened the door for tiltwall construction. The three factors combined to encourage general contractors to embrace tilt-up as an economical means of delivering quality projects that meet even the most demanding specifications and schedules.

Over the years, industry experts have continued to refine and enhance the tiltwall process, allowing general contractors and design-build construction managers to drive greater capabilities and creativity in its use. In 1986 the Tilt-up Concrete Association (TCA) was created to establish processes and standards to ensure continued growth in quality and acceptance for this method of construction.

Tiltwall has since been used in buildings as large as 1.7 million square feet, with individual panels reaching as high as 91 feet and weighing 150 tons. The TCA reports that 15% of all industrial buildings in the U.S. were created using tilt-up construction. It is growing at an annual rate of almost 20% and is used in over 650 million square feet of new building construction each year. In Texas and other sunbelt states, tilt-up accounts for as much as 75% of new one-story commercial building construction. Builders in Mexico, Canada and Australia are also using tiltwall construction on an increasingly frequent basis.

What is Tilt-up Construction? How Are Tiltwall Buildings Constructed?

 

The tilt-up panels are poured into forms that provide the exact size, shape and door openings to meet the design specifications. The panels can be massive; this panel at a Fort Worth, Texas office building project weighs about 50,000 pounds. The largest panel used for a tilt-up construction project weighed three times as much, just over 150,000 pounds.
The tilt-up panels are poured into forms that provide the exact size, shape and door openings to meet the design specifications. The panels can be massive; this panel at a Fort Worth, Texas commercial building project weighs about 50,000 pounds. The largest panel used for a tilt-up construction project weighed three times as much, over 150,000 pounds.
A tilt-up project begins with job site preparation and pouring the slab. During this phase of the project, workers install footings around the slab in preparation for the panels.

The crew then assembles the panel forms on the slab. Normally, the form is created with wooden pieces that are joined together. The forms act like a mold for the panels. They provide the panels' exact shape and size, doorways and window openings, and ensure the panels meet the design specifications and fit together properly. Next, workers tie in the steel grid of reinforcing bars into the form. They install inserts and embeds for lifting the panels and attaching them to the footing, the roof system, and to each other.

The slab beneath the forms is then cleaned of any debris or standing water, and workers pour concrete into the forms to create the panels.

Now comes the point where tilt-up construction, or tiltwall construction, gets its name.

Once the panels have solidified and the forms have been removed, the crew connects the first panel to a large crane with cables that hook into the inserts. The size of the crane depends on the height and weight of the panels, but it is typically two to three times the size of the largest panel. The crew also attaches braces to the panel. The crane lifts, or "tilts up," the panel from the slab into a vertical position above the footings. Workers help to guide the panel into position and the crane sets it into place. They connect the braces from the tiltwall panel to the slab, attach the panel's embeds to the footing, and disconnect the cables from the crane. The crew then moves to the next panel and repeats this process.

It's easy to be amazed as you watch the mobile crane tilt up a panel from the ground and set it into its place. Massive panels weighing 50,000 to 125,000 pounds or more dangle from the crane's long lines. The crew works as a team, setting the braces and guiding the panel with remarkable precision. The speed of the process is also remarkable; an experienced tiltwall crew can erect as many as 30 panels in a single day.

Once all the panels are erected, the crew apply finishes to the walls with sandblasting or painting. They also caulk joints and patch any imperfections in the walls. From this point the crew moves to the installation of the roof system and the trades begin their work inside the building.

Precast Concrete, Tilt-up Construction and Tiltwall: What's the Difference in These Terms?

 

Several terms - tilt-up panel construction, tiltwall construction, precast concrete building construction - are used to reference new or nontraditional cement building processes. Do they all mean the same thing? If not, what are the differences?

As previously stated in this article, tilt-up and tiltwall are two terms used to describe the same process. For a tilt-up concrete building, the walls are created by assembling forms and pouring large slabs of concrete called panels directly at the job site. The panels are then tilted up into position around the building's slab. Because the concrete tiltwall forms are assembled and poured directly at the job site, no transportation of panels is required. One major benefit of this is that the size of the panels is limited only by the needs of the building and the strength of the concrete panels themselves.

Tiltwall panels can sometimes be extremely wide and/or tall. Tilt-up panel have been measured at just over 69 feet across and almost 93 feet from top to bottom. Thus, architects and tilt-up concrete contractors have a great deal of flexibility in planning and creating their buildings.

Because concrete tilt-up walls are poured outdoors, contractors are at the mercy of climatic conditions. When temperatures drop below freezing, curing the concrete panels becomes more difficult and expensive. This is why tilt-up construction is particularly popular in southern parts of the United States, where cold weather occurs less frequently. Certainly, tilt-up concrete buildings are built in northern areas, but the window of time for temperate weather is much smaller and less predictable, which can make construction schedules more difficult to meet.

The precast concrete building process is similar to tilt-up construction, but it addresses the challenges presented by weather. For precast concrete buildings, work crews do not set up forms at the job site to create the panels. Instead, workers pre cast concrete panels at a large manufacturing facility. Because the precast concrete forms are poured indoors, this activity can take place regardless the weather conditions. After curing, the precast concrete panels are trucked to the job site. From this point, precast concrete buildings are assembled in much the same manner as tiltwall buildings.

The fact that precast concrete walls are formed at a manufacturing facility resolves the weather issue, but presents a different limitation not found in tilt-up construction. Because the panels must be transported - sometimes over long distances - places a substantial limitation on how wide or tall each panel can be. It would be impossible to load precast panels that were 60 feet wide or 90 feet long onto trucks and transport them any distance. For a precast construction project, the panels must be smaller and more manageable to allow trucks to haul them over the road to their final destination. This places greater design restrictions on architects and limits the applications where precast construction can be used.

Clearly, tilt-up or tiltwall construction and precast concrete are similar processes. Because tilt-up affords more flexibility, it is the method of choice in locations where the weather allows it. Precast concrete is a suitable choice in circumstances where environmental factors and the construction schedule preclude tiltwall as a viable option.

Why Do Design/Build Contractors Choose Tilt-up Construction?

 

The moble crane lifts the panel and tilts it into position over the footing. Workers help to guide the panel and keep the braces from getting tangled in the lines.
The moble crane lifts the panel and tilts it into position over the footing. Workers help to guide the panel and keep the braces from getting tangled in the lines. The process for putting up tilt-up panels goes quickly; an experienced crew, like this work crew in Dallas / Ft. Worth, Texas, can tilt up as many as 30 panels a day.
Tilt-up construction provides numerous advantages over steel buildings or traditional construction for warehouses, call centers, distribution centers, retail stores, office buildings, storage facilities and other types of industrial and commercial projects. Generally speaking, a one- to two-story structure larger than 50,000 square feet with less than 50% wall opening space is an excellent candidate for tiltwall construction.

But what are the advantages?

Once the panel is set in place, the crew attaches the braces to the slab to keep the panel standing until it is attached to the other tiltwall panels and the roofing system.
Once the panel is set in place, the crew attaches the braces to the slab to keep the panel standing until it is attached to the other tiltwall panels and the roofing system.

The benefits of a project built with tiltwall construction continue long after it is completed:

With a better understanding of these benefits, it's easy to see why many design / build contractors, construction managers and savvy building owners are opting for tilt-up over steel buildings or traditional construction. Delivering value, speed and responsiveness, quality, durability, reduced construction costs, and ongoing cost savings in operating expenses, tiltwall construction is the best choice for a wide range of commercial construction projects.

Tilt-up and Bob Moore Construction

 

Located in Arlington, Texas, Bob Moore Construction has over 50 years of experience with steel buildings, traditional construction and tilt-up construction in Dallas, Ft. Worth, North Texas and around the United States. A member of the TCA, this leading general contractor and construction manager has the experience and expertise to deliver your new building on time and in budget.
Located in Arlington, Texas, Bob Moore Construction has over 50 years of experience with steel buildings, traditional construction and tilt-up construction in Dallas, Ft. Worth, North Texas and around the United States. A member of the TCA and ACI, this leading general contractor and construction manager has the experience and expertise to deliver your new building on time and in budget.

Tilt-up construction has been a major component of Bob Moore Construction's philosophy of delivering quality buildings, on time and in budget, since the 1970s. As a leading general contractor and construction manager in Dallas, Ft. Worth, North Texas and across the United States, Bob Moore Construction is a member of the Tilt-up Concrete Association (TCA) and the American Concrete Institute (ACI).

The company has been a pioneer in tiltwall construction for over 30 years, with more than a half-century of experience in traditional construction and steel buildings. Over the years, the company has built several million square feet of quality buildings using tilt-up. Bob Moore Construction has used tiltwall construction for a wide range of applications, including office buildings, retail centers, warehouses, distribution centers, call centers, manufacturing facilities and other commercial / industrial structures.

In 1997, the company's Vice President of Construction, Ed McGuire, became a founding member of the educational committee on Tilt-up Construction Certification. This committee represents a joint effort between the ACI and TCA to develop educational and testing resources for industry professionals. The committee's Tilt-up Supervisor Certification Program now provides training, testing and certification for qualified site supervisors around the country. As architects and builders become more educated on tilt-up construction, the organizations believe this certification will become a required qualification in many projects' specifications. Bob Moore Construction's ongoing participation in this important committee reflects the company's commitment to the continued growth in quality, safety, standardization and acceptance of tilt-up construction.

Experienced in the process and educated on the latest innovations, the project managers with Bob Moore Construction can work with you to see if tiltwall is right for your project, and manage the process from design to completion with your needs, schedule and budget in mind.

If you would like to learn more about tilt-up construction or discuss how Bob Moore Construction can help on your upcoming project, please call us at (817) 640-1200 or click here to contact us online.

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Bob Moore Construction, Inc.
1110 North Watson Road
Arlington, Texas 76011
(817) 640-1200 • Fax: (817) 640-1250
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