Contact Rubb USA by phone




Quality Materials

Selection of quality materials is a critical part of our commitment to quality.


Over the last twenty-five years, Rubb has grown into an international group of companies with complete engineering and production facilities in Norway, Great Britain, and the United States.



Simple Foundations


Simple foundation preparation reduces cost and increases flexibility


An advantage for Rubb structures is low cost, fast foundations. Piling is rarely required even on sites where settlement is expected. Rubb requires foundations designed to withstand uplift forces, as opposed to compressive forces. Consequently, a ring beam, or a concrete pad on which to bolt span base plates, is usually sufficient. For short term situations, a steel ring beam equipped with outriggers and ballast weights can be used.



Building Range on Concrete Foundation

Building Range on Concrete Foundation

Building Range on I-Beam with Earth Anchors

Building Range on I-Beam with Earth Anchors

Shelter Range Base Angle with Spike Anchors

Shelter Range Base Angle with Spike Anchors

Shelter Range Base Angle with Ballast Weight

Shelter Range Base Angle with Ballast Weight




Rubb Ground Anchor System


This system consists of a hot dip galvanized steel beam that runs continuously around the building perimeter. The beam is generally anchored using either ground anchors, ballast weights or anchor bolts into concrete. Depending upon the site conditions and foundation forces, sometimes a combination of methods is used.







Steel framework


All steel used in Rubb structures is post-fabrication hot dip galvanized for strength and durability.


Anyone selling a non post-fabrication hot dip galvanized structure is simply selling an inferior product. It’s that simple.


Each Rubb frame is composed of smaller more manageable sections, which bolt together on site. Buildings spanning up to 100m are available in any length. The steel framework is protected from corrosion by hot dip galvanizing. Galvanizing is the process of metallurogically bonding a tough coating of zinc onto the steel surface. Microscopic analysis shows that there is no demarcation line between the steel and zinc but a gradual transition through a series of zinc-iron alloys. The protected coating is fused into the metal and therefore will give much better protection than other coatings such as paint. Whereas protection by paint may have to be re-processed every 5 or 6 years, protection by galvanizing should last in excess of 30 years even in exterior usage in coastal environments.


The process of dipping the post fabricated steel into a pool of molten zinc allows the coating to protect the steel internally, externally and at all joints. This process is considerably more expensive and time consuming than inferior methods(paint/spray/pre-fabrication galvanizing) but is well worth the effort as Rubb structural steel is virtually corrosion proof.


All Rubb structural steelwork is hot dip zinc galvanized to ASTM A123. Prior to galvanizing, all surfaces are cleared of oil, grease, rust, and debris. An environment category C3 is typically adopted which achieves a minimum coating of 85μm. However, galvanizing coating can be adapted to suit specific environments by request.






Hot Dip Galvanized Steel Frame Supported Structures


All steel used in Rubb structures is post-fabrication hot dip galvanized for strength and durability.


For anyone considering steel famed buildings and structures, careful thought must be given to the construction materials being proposed by the supplier. This will ensure that you get the best building for your money. For example, there are three different manufacturing processes that can be employed to produce the completed framework of a steel framed fabric building. The quality and longevity of the finished structure is dependent upon the method chosen.



1. Painted Black Steel (NOT ADVISED)


In this process the steel framework is welded together and then painted before being erected on site. Unfortunately the paint is susceptible to chipping, particularly during handling and transportation, and such damage results in rust and a reduced lifespan.


2. Pre-Galvanized Steel (NOT ADVISED)


Here zinc galvanized tubes are first bent or welded together then the "black" areas are treated with a special paint to prevent corrosion. This process is used by several fabric building manufacturers and the main benefit is a reduced cost. However, the weld points usually start to rust, even though they have been painted, and the result is, again, a limited lifespan and unsightly appearance.


3. Hot-Dip Galvanized


In this process, the complete framework is built of welded black steel and then hot-dip galvanized to provide a consistent zinc coating over the entire structure. All Rubb Buildings are Hot-Dip Galvanized post-production for the highest level of quality and longevity.






High Quality PVC Coated Fabric


Although the lifespan of a steel framed building depends on environmental conditions and the potential corrosiveness of materials stored inside, many Rubb architectural membrane buildings worldwide are still in useful existence twenty-five years or more after being erected.


When considering the fabric cladding, the longevity issue becomes even more complex. There are so many different types of fabric and fabric coatings to choose from and care must be taken to ensure that comparisons are being made on a like for like basis. Beware of often lesser expensive and poor quality PE(polyethylene) claddings that will degrade quickly.


Rubb uses only the highest grades of coated PVC, flame retardant, high tenacity polyester which features a rip-stop structure weave to prevent tears. Rubb only uses 28oz/yd2(900g/m2) material with special coatings to protect against UV radiation to extend design life.


The fabric cladding on Rubb steel-framed structures has been proven to last at least 25 years before replacement becomes even a consideration. This, however, depends on a number of factors such as environmental conditions and the corrosiveness of the materials stored inside.


An excellent example of a long-lived Rubb building is a structure built in 1975 for Peck & Hale in New York State. An outside laboratory tested a sample of fabric taken from the building that confirmed that the fabric's self-extinguishing and flame retardant characteristics were still present and the tensile strength had been maintained -- after 30 years the only deterioration was a slight reduction in the fabric's tear strength! .