Modified Truss
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Different Steel Buildings And Structures by Adriana Noton
Different steel buildings and structures are available. These include Quonset huts, I-beam shelters, and combination metal and wood buildings. Each of these has its own advantages as well as disadvantages. Depending on their intended use one is better for certain functions than another.
Quonset hut buildings are self-supporting structures that have a curved shape. No interior posts exist, nor do trusses or supporting beams. Exterior sheeting is the entire building. These huts come in two styles: old-fashioned and modified. The older design is in a semi-circle shape and makes a full arch. The second has straight walls with a curved roof. This increases wall space that is lost with the fully curved design. However, when used for crop storage only the old-fashioned curved walls will be able to withstand the pressure placed against them.
Huts have many advantages. They are generally the cheapest option, are very easy to assemble, and are shipped inexpensively. The entire inside area is clear without beams and they are easy to take apart, move, and reassemble. However, there are disadvantages to the Quonset design as well. They are not easily insulated and do not have door openings on the sides. Adding color is not an option and the curved walls make it difficult to install electrical, insulating, or plumbing equipment.
I-beam buildings are another type of structure, and one of the most common. They have a rigid main frame truss as the support. Each truss has two sidewall and two roof sections that are bolted into a concrete foundation. When assembled they form either a box or rectangular shape.
The advantage of the I-beam models are that they are readily available, due to wide popularity. Also for this reason, most construction businesses will have experience setting them up. They also come in various different colors and generally do not require internal supporting posts or columns. Drawbacks are that they sometimes accumulate inside condensation and have a box shape without roof sloping. Heavy equipment is usually required for installation, depending on the size. Many will require professional help.
Structures made of a combination of steel and wood are also available. These have main frame steel trusses like the I-beam buildings. After erecting these trusses, wood purlins and girts are attached to them. This combination of materials offers many benefits.
Advantages of the combination structures are that they allow for interior furnishings. Also, exterior materials can be varied and be made of vinyl or wood instead of metal sheeting. They can be insulated easily and the roof sloping is generally higher than other models. Disadvantages are that wood must often be purchased separately from the steel building components. Because of the higher ceiling, more energy will be required to heat or cool the unused ceiling space. If covered with exterior sheeting, it must be of a thinner width than those used for huts.
Steel buildings and structures come in many varieties. Some are curved, others are shaped like a box. Some are all made of steel, others incorporate wood. Depending on what they are being used for, different types are more appropriate than others.
Future Steel Buildings is the go-to place for commercial and industrial application of storage solutions. Find high-quality garages and carports at Future Steel Buildings today. For every occasion, there is a wide selection of future steel buildings available at affordable prices.
Article Source: http://www.earticlesonline.com/Article/Different-Steel-Buildings-And-Structures/1130584
Roof deflection (sagging) fixes and prevention?
I'm having trouble finding resources to help me on this. Any answers, and especially links would be appriciated. I have recently moved into a new home. Problem #1 is the attached two car garage. It has significant sagging in 1/4 of the roof. It is a modified truss system with 2' spaced rafters. The ceiling joist is undersized. It was braced is one spot and seems to have minimized sagging. I have braced it on the other side and was able to raise the joist quite a bit but there is still quite a lot of sagging that I would like to fix. There is a very minimal amount of weight currently above the garage.
2nd issue is a large rear garage. It also has 2' rafters. Standard truss system. There is no main joist. I am wanting to store some amount of stuff above this garage. The trusses will prevent alot from going up there and I will of course not store anything to heavy. I am still worried I will cause sagging in this garage. What is the best permentent solution to this?
Run a 2X6 (on edge) along the bottom of the trusses (but on top of the bottom chord) so it is perpendicular to the trusses on the same plain. From this you can add jack posts to the ridge beam where it sags. This will add minimum weight and provide maximum support. Screw 2X6 to each joist and/or block as necessary to prevent rolling/twist moment. For problem two double a 2X8 and run it under your joists on edge and support it every 8 feet with vertical posts to the ground. Now you can store an elephant up there.
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