STEEL BUILDING FEATURES
A steel building is the most economical building choice you can make. Compared to other traditional construction materials, steel is stronger and more resilient than conventional construction materials. Steel buildings are long lasting and low maintenance. On the average, a steel building system can be assembled in approximately two-thirds the time required for conventional construction. The appearance of steel buildings can be enhanced with stucco, stone, brick or glass. A well-insulated metal structure can drastically decrease energy costs. One advantage of steel buildings is that they can be expanded and reconfigured as the need arises.
TYPICAL STEEL BUILDING FEATURES
Usually, steel building system contains the following features:
1. PBR Roof Panels. Purlin Bearing Rib Panels provide a full overlap, preventing water from leaking into the building during storms when the usual strong winds force rain against the overlap. The spot where the sheeting overlaps, the panel runs all the way to the bottom of the corrugation and along the bottom like a versed "L". The system provides additional strength as well as protection against leakage, because the top panel resembles a "Z" and overlaps the bottom panel.
2. Steel Main Frame I-Beam. A steel frame usually refers to a building technique with a skeleton frame made up of vertical steel columns and horizontal I-beams. These vertical columns and horizontal I-beams are constructed in a rectangular grid to support the floors, roof and walls, which are all attached to the skeleton frame. It is the most common type of construction for steel buildings. The I-beam is so named because the profile of the steel beam looks like a capital letter "I", forget out of steel like a railroad track rail. The system is called a "rigid frame". A steel main frame truss is the central support of the building. After assembling the metal components on the ground, each solid steel "I" beam truss is raised and bolted to the concrete foundation. Typically, the spacing between trusses is 20-30 feet or 6-10 meters.
3. Stainless Steel Self-Drilling Fasteners. Stainless steel self-drilling fasteners have corrosion resistance and long service life. They are made for rapid drilling without slipping of the drill point, thus reducing walking and surface marring. They are strong, ductile, reliable, and virtually immune to delayed embrittlement.failures. They can be quickly drilled and tapped into steel up to ½" thick. The neoprene washer keeps the building watertight as well as lessening vibration.
4. Galvanized Girts, Purlins, and C-sections. Girts (walls) and purlins (roofs) run the length of the building since they provide much needed rigidity, and a sturdy skeleton where the sheeting can be attached. A "C" section is formed from a steel sheet in the shape of a block "C" which may be used either singularly or back to back, supporting either vertical or horizontal loads. All girts and purlins are pre-punched to provide ease of assembly.
5. Silizonized Polyester Coating. The sheeting is coated with siliconized polyester paint which provides superior reflective qualities. The coating acts as a thermal barrier to keep the insides of the steel building cooler in hot climates.
6. Doors. Standard doors come in two designs – single swing, double swing, roll-up, bi-fold, and sliding.. They come complete with installation hardware. Additional door features such as weather stripping, narrow-lite, half glass panels, insulation can be added.
7. Horizontal Sliding Windows. These windows are made of aluminum and they are virtually maintenance free. Each window system comes with a latch, half screen and weather stripping with a choice of insulated or non-insulated glass.
8. Insulation. There are three types of insulation specifically designed for steel buildings. Vapor-lock composite insulation consists of polyethylene air bubble pockets sandwiched between thick layers of reflective coating. A traditional type of insulation is the WMP-VR fiberglass insulation which comes in a rage of "R" values. The third type is the premium insulation system designed to fit singly between purlins to make them more compression-free. The combination of these three different insulation systems will give a finished look to the building’s ceiling while providing the roof with a high insulation R-value of 40.
9. Additional Accessories. Additional accessories for steel buildings are wall louvers, reinforced translucent skylights, ridge ventilators, stall systems, snow stoppers and many more.
All framing members are pre-fabricated for field bolted assembly unless otherwise specified on project plans and specifications. All the steel building parts are properly marked for easy field identification. Clearspan rigit-frame buildings, mdular, and single slope are the primary frame types supplied by pre-engineered steel building suppliers.
1. RigidClearspan Frames. The clearspan rigid rame system offers strength, versatility, cost-effectiveness, and clear, unobstructed working space, because no interior columns or supports are required. The wide column-free environment provides 100% usable space.
2. Modular Frames. This type of structural framing incorporates interior support columns.
3. Single Slope Frames. Single slope frames are characterized by symmetrical, one sidewall slopes from front to back. Typically, they have minimal roof pitch, which is the number of inches a roof rises vertically for every 12 inches it runs horizontally.
Aside from girts, pulins and "C" sections, other secondary framing members are angles and eave struts.
An angle is a secondary structural member which is bent at a right angle and is used for joining and reinforcing two structural members.
An eave strut is a structural member that supports roof and wall paneling and is usually located at the eave of the steel building.
As a second framing system, girts are used to support vertical loads while purlins provide support for roof coverings of the steel building and are in the shape of a "Z".