Structural Design

We design and manufacture pre-engineered steel buildings, and offer you a number of advantages over conventional construction techniques. Steel buildings are inexpensive and incredibly tough. Our bolt-together design is assembled quickly without any specialized skills. Each rigid frame is comprised of two or more columns supporting a rafter across the width of the building. In most steel buildings, endwall bearing frames support one-half the load of a rigid "main" frame. In most situations, we utilize the more economical "bearing" end frames. Adding an expandable endwall or rigid frame is only a click away. Unlike any of our competitors, we allow you to choose the endwall condition of your building. Depending on design considerations, our endwall rafters and columns may be either hot rolled or cold-formed.

The space between the rigid frames of a steel building is referred to as a "bay."- an 80' long building has been divided into four 20' bays by spacing the frames 20' apart (4 x 20' = 80'). This configuration is described as "four bays at 20." A 100' building could be configured with four bays at 25 (4x 25' = 100')

Endwall bay spacing is usually determined by the building width. You can add one or more framed openings to most buildings. Endwall bay spacing can usually changed to accommodate your needs without changing the price.

Structural Framing

All frames are welded on a state-of-the-art computerized submerged welding system. We are capable of producing structural members up to 72" in depth, which gives us the ability to manufacture clear-span buildings up to 150 feet wide! A factory primer coating is applied to protect the beams during shipping and erection.

All framing members shall be shop fabricated for field bolted assembly unless otherwise noted on plans and specifications. All building parts shall carry an identifying mark for easy field identification. Structural framing shall include tapered beam frames, tapered rigid frames, modular beam and columns, lean-to rafters and columns, canopy beams, intermediate columns bearing end frames and end wall columns. Steel used in the fabrication of built-up primary structural members shall have a minimum yield of 50 KSI. Hot rolled primary structural members shall have a minimum yield of 50 KSI. Cold rolled structural members shall have a minimum yield of 55 KSI. Primary framing shall be shop fabricated and include all holes required for attachment of secondary members and bracing. A continuous arc-welding process shall join flanges and webs of built-up welded members. End wall columns and rafters shall be "hot-rolled" built-up "I" or standard "cee" sections.

Connections - All field connections shall be bolted. All primary bolted connections shall be furnished with high strength bolts conforming to A.S.T.M. A-325. All secondary bolted connections shall be furnished with machine bolts conforming to A.S.T.M.-A307.

Insulating Against Radiant Heat

Traditional forms of mass insulation, like fiberglass, are effective in preventing heat transfer by conduction and convection, but they less effect on radiant heat. Between 80 and 90% of the radiant heat striking fiberglass will pass through or be "emitted". Radiant transfer typically has as much impact on the temperature in a building as conduction and convection. For more information on radiant barrier facings click here.

Misleading Information - Deceptive Practices

The standards and values of our industry are regularly masked by the deceptive practices of the unprincipled few. These companies deliberately mislead people hoping to increase their chances of a sale. At Metal Building Depot we know that the more you understand about the product you are buying, the more confidant you will be at purchase time.

Arm yourself with information - No manufacturer keeps an inventory of buildings "ready to ship." Without exception, steel buildings are made specifically to order. A building should be designed to meet your needs and more importantly - your building code. Some companies create "general" price lists for common sizes, but the selection is very limited to a geographic area with limited variance in design.

Beware of companies implying they keep an existing inventory of buildings. To find out whether a "clearance" or "cancelled order" really exists inquire on the earliest ship date. You should be able to take immediate delivery on a building "ready to ship."

There is no such thing as making simple structural changes on a pre-designed building. Moving or adding a door opening on an existing or "ready to ship" building - could require the use of a wind column or portal frame. This could change the rigid frame design and render the existing design useless. Additionally, changing the wind or snow load could require the girt and purlin spacing to change and the location of connection plates along columns and rafters may not be located properly. The bottom line is that a structural change most likely requires a new building design. The moral of this story is: If a seller claims to have a building "ready to ship" make sure it will meet or exceed you local building codes and loads and more importantly - your needs.

Proposal or Propose "ALL" - We want to help you eliminate the "gray areas" in a typical building quote. The items listed on your contract should be made clear as to exactly what is being promised. Our itemized contracts are detailed and specific and you'll never see "included" in one price (without a description). All your accessories and options are listed as separate line items. With our online quote you will always know exactly what you're paying for.

Roof Pitch

The angle of a steel building's roof is determined by roof pitch. Roof pitch indicates the rise vertically for every 12 inches of travel horizontally. Our online system allows you to choose up to a 6:12 pitch. There are many considerations with both higher and lower roof pitches. Higher pitched roofs may add to the cost of the building, but can add performance to a building in a heavy snow region. Additionally, you can take advantage of extra space above. High-pitched roofs are less likely to leak and can add style to your building.

Low-pitched roofs require less material and therefore cost less. Also it is easier to heat and cool a building with a low-pitched roof. One major advantage of a low-pitched roof is expandability. If you ever add-on to your building you will be able to add more space while keeping the loss of headroom to a minimum.