PrīmXComposite Hits the Ground

The 183,000 square foot floor without a single saw cut was poured over two weeks in August.

The most advanced floor system on the planet offers users a far more efficient and less expensive to operate floor for warehousing, distribution, and manufacturing.Cutless PrimeComposite Slab

The 6” floor replaced a 10” thick slab with a double matt of rebar, saving the client hundreds of thousands of dollars while providing them with 60% more load capacity than the 10” design.

Gresser engineered the floor based on BTD’s load requirements.

Prime Composite eliminates floor cuts and associated curling and joint maintenance for owners and users. Not only is service life increased and maintenance costs and down-time reduced, warehousing equipment such as fork trucks undergo far less abuse and maintenance costs due to not bouncing over joints all day.

Users also have complete flexibility for racking and aisle layouts because unlike traditional concrete floors, the entire floor is flat.

PrīmXComposite is a true breakthrough in industrial floor systems.

Gresser is the exclusive licensee and installer of Prime Composite in the area.

For more information contact, or Jake Matlon at (651) 675-3488.

Gresser Companies becomes licensee for Primekss North America’s PrīmXComposite

PrīmXComposite is a steel fiber-reinforced high-tech, saw cut-free flooring system

Innovative composite floor is jointless, stronger and thinner than
traditional concrete slabs


SHAKOPEE, Minn.—Gresser Companies, a full-service concrete and masonry contractor, signed a license agreement with Rabine Group/Primekss (pronounced Prime x) of Chicago to provide PrīmXComposite, a jointless, steel fiber-reinforced, composite flooring system. The company is currently licensed to engineer and install PrīmXComposite flooring in Minnesota, North and South Dakota, northern Iowa and western Wisconsin, with potential future geographic expansion.


Stronger, yet up to 60 percent thinner than traditional reinforced concrete floors, PrīmXComposite flooring is jointless and has virtually no shrinkage or cracking. These characteristics make this composite flooring system ideal for distribution centers, food processing plants, automotive and aerospace manufacturing and other facilities benefiting from jointless floors.


“Concrete is the world’s most ubiquitous building and flooring material,” says Janis Oslejs, CEO of Primekss Group. “PrīmXComposite is a better-quality floor that reduces building and usage costs. Gresser Companies, together with Primekss Rabine, is building the most durable, leanest, jointless and environmentally friendly floors the world has ever known. PrīmXComposite takes concrete to a new quality and environmental level.”


“Traditional concrete slab design is still based on analysis from the 1950s and ‘60s. Even though slabs are a main complaint of building owners and maintenance managers, there has been very little design effort to improve it,” explains Kevin A. MacDonald, Ph.D., PE (MN), FACI, principal engineer at Benton Consulting Engineers, LLC and former chair of ACI 223 “shrinkage coTraditionalvsPrimeComposite_Hi-Resmpensating concrete.


Concrete dries from the top down resulting in curling at the joints and around the perimeter. This can cause the slab to loose contact with the base material, making it susceptible to fracture. Curling also increases maintenance and repair costs of forklifts, other equipment and the slab. In warehouses, forklifts crossing the step in elevation often results in the forks scraping the floorand jarring impacts. High-reach stackers operate with decreased accuracy and need more maintenance, impacting productivity. Also, storage rack position needs to be planned around uneven flooring at the joints.


Each PrīmXComposite floor is specifically engineered to exceed load requirements of the specific floor by Gresser’s experienced engineering team. The PrīmXComposite floor is virtually maintenance free and has a significantly longer life cycle than conventional concrete slab floors. The no-curl, no-control joint properties reduce equipment maintenance costs, increase material handling productivity and allow storage racks to be placed and moved wherever needed—creating complete design flexibility compared with traditional concrete.



“ConformiWarehouse Floor-hi-res-captionng to International Building Code, PrīmXComposite jointless floors are a different way to approach slabs on ground. Comparable to solutions that have been around for over 20 years, this is a more modern construction,” continues MacDonald. “Conceptually similar to carbon fiber, the steel fibers and expanding construction spread out the load over a large area. A thinner slab of PrīmXComposite flooring is stronger than traditional concrete slabs and requires no joints. While some cracking may occur, the steel fibers prevent sheering.”


To view a safety factor analysis or learn more about PrīmXComposite, visit To schedule a personal tour of a PrīmXComposite floor, call 651.454.5976 or email


“Stronger, lighter, thinner and better than concrete, PrīmXComposite is a true innovation in commercial and industrial flooring. We traveled halfway around the world to research this system and inspected millions of square feet of flooring,” explains Mike Gresser, president and CEO of Gresser Companies. “We were so impressed with PrimeComposite that we placed nearly an acre of it in our new facility here in Shakopee. For nearly a year we have stressed our 4-inch PrīmXComposite floor with loads, such as fully loaded semis, that would have needed 8 inches of traditional reinforced concrete. A traditional concrete slab this thin would be broken apart. The conventional concrete floors in our facility are already showing joint deterioration and damage, while the PrīmXComposite looks like it was placed yesterday.”


Eligible to earn LEED credits, PrīmXComposite steel fiber-reinforced floors offer many sustainability benefits over conventional concrete slabs. Less material is needed, hazardous silica dust from joint sawing is eliminated and carbon dioxide (CO2) emissions from cement production are reduced by up to 50 percent over traditional concrete slab floors.


About Rabine Group

Rabine is committed to delivering quality and innovation, while exceeding our clients’ expectations. Rabine Group is a provider of pavement, roofing, snow removal, flooring, fuel and other construction services. Rabine Group companies include: Rabine Paving, Rabine Paving America, Pavement Solutions, Rabine Utility Paving, Roofing Solutions America, R. Commercial Roofing Solutions, Crawford Roofing Experts, Rabine Snow Pros, Pipe View, Palatine Oil Company, and Rabine PrimeComposite as well as the Rabine Group Foundation. For additional information, visit

About Primekss  

Founded in Latvia in 2000 Primekss developed the PrīmXComposite jointless concrete floor system and has placed millions of square feet of the flooring system throughout Europe. They continue to be involved in mix design and materials analysis to ensure that each PrīmXComposite floor is designed to exceed load and performance requirements.


Rabine Group and Primekss (pronounced Prime x) have joined to bring the PrīmXComposite system to the Western Hemisphere.


About Gresser Companies

A full-service concrete and masonry construction company, Gresser was founded by a craftsman nearly 50 years ago. The company attracts and keeps the best, most highly trained tradespeople, project managers and supervisors in the industry. Experienced people, combined with advanced technology and old-world craftsmanship, allow Gresser to provide top-quality finished products and meet or exceed difficult schedules and demanding requirements. For more information visit or call 651.454.5976.




Gresser Companies

3 Checkered Flag Blvd.

Shakopee, MN 55379


Gresser off to a great start pouring a 7″ 485,000SF warehouse


Gateway 5 in Otsego. Photo of a 40,000SF pour.

Gateway 5 in Otsego. Photo of a 40,000SF pour.

Gresser HQ Address is Now Officially: #3 Checkered Flag Blvd. Shakopee, MN 55379. More details to follow.

Gresser Launches New Prime Composite PrīmXComposite Flooring System Today.


PrīmXComposite Flooring: Upon concrete delivery a shrink-compensating additive, water, steel fibers, and superplasticizer are added to the truck.


The mix is placed and screeded. Normally a laser screed is used but size of this test pour did not justify a laser screed.


After the concrete is placed and screeded, a topping hardener is applied to the concrete.


The topping hardener is power-troweled into the top of the concrete. The last step in the process is a seven day wet cure.

Gresser Wraps Up Associated Bank Project in St. Paul Today


Gresser performed concrete and masonry work including stone veneer and burnished block for the new Associated Bank location off Snelling Ave. and Dayton Ave. in St. Paul.

Gresser Working on Runway Install at the 934th Airlift Wing

photo 2

A conveyor is used to place the concrete during these pours.

This project involves 5 concrete pours consisting of over 600 yards on each pour.

This project involves 5 concrete pours consisting of over 600 yards on each pour.

Gresser Tops Off 4 Story, 220,000 SQFT Post Tensioned Concrete Frame for New Condo Building on Lake Minnetonka.


Multifamily - Regatta

Rendering of completed Wayzata Regatta Condos.