What’s Important to Know about Steel Building Codes

Metal Building with Yellow Door

Building Codes Must Match or Exceed Local Code Requirements.

In summary, you should be familiar with the following codes prior to building purchase in order to avoid potential challenges after building delivery:

  • Snow Load/ Wind Speed
  • Wind Exposure, Example: Exposure B or C
  • Governing Code, Example: IBC 2012 or 2015, other State Specific.

Current website prices reflect IBC 2015, Wind Exposure B.

We recommend you call your local building department to confirm your requirements prior to ordering, especially if you are required to obtain a permit.

Contact Your Local Building Department Ahead of Time for Permit Requirements

While your metal building broker will ask you to confirm these codes per your local building department, the MBS (design and pricing software used by your broker) will recall default minimums when the representative enters your building site ZIP code.  In many occasions, the local building department will ask you for higher than these default minimum requirements and dictate which building code year governs these specifics. For example, IBC 2015 or NCBC 2014 (International Building Code for year 2015, or North Carolina Building Code for year 2014, etc.)

The building that you order will be specifically engineered according to the necessity of meeting all of the above code requirements.  In addition, building plans are provided by a certified engineer that show the calculations and anchor bolt settings which your Foundation Plan engineer will require in order to provide a foundation prepared to handle the conditions optimally for a long life of your steel building structure.  

Additional Information about Steel Building Loads…

Types of Loads On Your Steel Building

Over the years, building codes have become more and more accurate due to life experience in the field of steel building engineering, construction and data collection. Together, building codes as revealed by your ZIP code and confirmed by your local building department, along with steel building fabrication technologies, serve to alleviate concerns regarding our safety.  In order to understand the need for accurate building codes, we begin with a short course about the types of loads put upon a steel building structure.

Dead Loads

Steel, by the nature of its own strength, carries a heavier dead load than a wood frame building…meaning, capacity to carry the weight of its own material alone.  Steel building structures can carry their own load of framework, wall and roof panels without the use of interior load-bearing support columns for building widths up to 300’ wide.

Collateral Loads

The standard minimum collateral load is 0.5 psf which allows for insulation and lightweight lighting to be attached to the ceiling.  However, if you intend to finish the interior of your building with materials, such as acoustical tile, sheetrock, heavier lighting, sprinkler systems, ductwork, etc., then be sure to note the increased requirements which you have confirmed with your building department.

Environmentally Speaking…

In addition to holding its own loads for structural, wall and roof panels, the pre-engineered metal building system must also carry the load of snow, ice, water, wind forces, and seismic factors.  These loads vary by location, of course, as affected by climate and soil conditions throughout the year. Over the years, data has been collected for these variables and are built into Metal Building Software (MBS pricing and engineering programs) based on ZIP codes that your broker uses to design and quote your building.

Roof Snow Load – per Square Foot

Typical snow loads in the United States range from 4 – 60 lbs depending on precipitation.  Obviously, in warmer climates there are 0 lb minimum snow load requirements, whereas, in colder states where snow and ice hardly have a chance to thaw before the next storm, roof snow loads can be greater than 60 lbs per square foot.  In addition, snow tends to drift and accumulate heavier in some spots than others, which is why snow loads are a factor in addition to the standard dead loads of a building.

Consider this; 1 cubic foot of water weighs approximately 62.4 lbs. (that’s about 7.5 gallons of water).  According to FEMA Snow Load Safety Guide, “The weight of one foot of fresh snow ranges from three pounds per square foot for light, dry snow, to 21 pounds per square foot for wet, heavy snow.”   Thus, the weight of 1 cubic foot of ice and snow approaches 62.4 lbs, yet won’t reach this weight if melting occurs.  This is why maintenance and snow removal still may be necessary during the winter months in your area.   It’s the build-up which begins to become excessive of the maximum load requirements that your steel building was designed to carry which could potentially invalidate the structural lifetime warranty offered with your building purchase.

Wind Codes – Miles per Hour

Wind load is also determined by patterns of climate local to your building site. Wind speed codes range from 0 mph to over 160 mph winds.

Wind, unlike snow, will affect different portions of the building not limited to only the roof.  The wind’s effects on your steel building structure will vary depending on your building design and how it sits on your property.  During the software designing process, strength factors are determined by building height, the size and number of large framed openings, and even the location of those openings.

Wind Exposure B or Wind Exposure C

Also in relation to wind is the exposure of your building. Exposure B or C is site-specific.  For example, in gusty areas, your local building department may require Exposure C if there are no windbreaks provided by your surroundings, such as trees or neighboring buildings. Wind exposure also affects how snow tends to drift and accumulate on your building structure.  Your local building department can advise you as to whether or not your specific steel building erection site is requiring Exposure B or Exposure C.

Seismic Factors

Most buyers don’t generally know their seismic measures, however, they do play a significant role in the design of the building and are revealed by building site ZIP codes.  If you will be building near a fault line, for example, expect strong seismic factors to be incorporated into your building components for added strength. You don’t necessarily need to know these numbers, as they will default in the design software and be reflected in the measurements required for strong building components which may or may not cause price fluctuations as necessary

For those Requesting A Wholesale Quote, please fill out quote form. Also have the integrity to pay the profit % you selected within the time-line you selected OR email a competitor’s quote (black out competitor’s name) that reflects a lower price within this time-line. Factory Steel Overstock will honor its guaranteed saving terms. 

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“I ordered three buildings and this has been an excellent experience. The website is extremely helpful for planning purposes. The order process is efficient and staff is very efficient and helpful. I have already recommended FSO to a friend.”
Connie C. 7/2/2018

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Key Features Included

  • 40 Yr. Warranty on Colored Walls and Trim
  • Solid I-Beam Construction
  • Clear span design (no interior columns)
  • Lifetime Structural Warranty
  • Complete Trim Package for walls, roof and doors  (base angles and base closures in lieu of base trim)
  • Framed Openings Fully Flashed
  • 40 Yr. Warranty on Colored Roof or
    25 Yr. Warranty Galvalume  Plus Roof Finish
  • 26  or 24 sheeting -80,000 p.s.i. tensile strength
  • 1 1/4″ sheeting profile
  • Sheeting is Purlin bearing rib (PBR panels – larger overlap than R panels- All panels incorporate the purlin bearing profile)
  • Long life roof fasteners | All bolts, screws, closures, weather stripping, sealants, fasteners as required to erect structure (anchor bolts by others).
  • The pre-punched connecting clips for the structural members, including endwall columns, are welded in place and then primed during fabrication
  • All structural elements for the specified framed openings (jamb, girts and headers) are pre-cut and pre-punched and the necessary clips are welded on during fabrication
  • Anchor bolts and erection services by other. Manufacturer is an AISC (American Institute of Steel Construction) certified plant as well as an MBMA (Metal Building Manufacturer Association) member.
 

FACTORY STEEL OVERSTOCK’S SPECIFICATIONS

Free (Initial) Certified Building Plans for ALL 50 states.

  • Letter of Certification
  • 2 sets of certified stamped erection plans
  • 2 sets of certified stamped anchor bolt plans

PRIMARY FRAMING

(Mainframes)

SOLID I-BEAM CONSTRUCTION

Material used is minimum 50,000 p.s.i. yield strength. (Some manufacturers use 35,000 p.s.i. yield strength material, which is not as strong). Frames are single bead, continuous submerged arc welded by automatic welding machines to help insure quality. A factory-applied rust inhibiting primer is used to help protect the mainframes and secondary material during the erection process.

ENDWALL FRAMES AND COLUMNS

are either cold formed, hot-rolled or built-up “I” sections depending on design requirements.

SECONDARY FRAMING

GIRTS (in sidewall) and PURLINS (in roof) are minimum 8” to meet design requirements. Cold rolled Z-section, 12 to 16 ga ASTM A-653, 55,000 p.s.i. yield material is used to provide maximum strength.

Bypass girt system overlaps at sidewall columns forming a continuous “span” for extra strength. All girt clips are factory welded for easier erection.

PURLINS are top-mounted on the rafter with a varied lap of 1’6” to 5’ for strength and cost savings in erection labor. Maximum purlin spacing is 5’ on center.

EAVE STRUT is a cold-formed C-section that is rolled for the appropriate roof pitch to help insure weather tightness at the eave.

RAKE ANGLE is a 2×4 angle supplied for the attachment of the sheeting at the rake of the building for ease of installation.

BASE ANGLE is a 2×4 angle supplied for the attachment of the base of the sheeting to the concrete. The base angle is to be attached to the concrete with ram-sets or equivalent anchors.

BRACING All diagonal galvanized cable bracing is supplied for roof and walls to remove longitudinal load from the structure. Galvanized cable is used rather than solid rod to prevent the bracing from “sagging” under its own weight and it is easier to install. All cables are pre-stressed and pre made for easier erection.

Angle Flange Bracing is provided for the connection of the rigid frame to the purlins and girts. This insures the allowable compressions are adequate for any combination of loading.

FRAMED OPENINGS have cold-formed C-section jambs and headers to help insure easy installation of overhead doors, etc.

SHEETING

24 or 26 gage 80,000 P.S.I. yield strength material standard. Some manufacturers use a lower yield strength material, which is less resistant to damage from hail or other impacts. 40 year warranty on premium color finish on walls and trim. Roof finish is galvalume or premium colored finish

ALL COIL STEEL has a minimum of G-90 class Galvalume substrate (1.25oz hot dipped) to help prevent deterioration of the steel sheeting.

DEEPER HIGH-RIB SHEETING (PBR) with more frequent corrugations provides extra strength.

FASTENERS

STRUCTURAL BOLTS meet requirements ASTM Standards.

A-325 for primary frame connections

A-307 for secondary framing

SELF-DRILLING AND SELF-TAPPING FASTENERS are pre-assembled with neoprene washers and metal caps to help insure weather tightness.

CLOSURES

CLOSED CELL NEOPRENE STRIPS are used to help seal building. Located at eave, gable, and optional at the base of building to help provide weather tightness. Pre-formed shapes to match panel configuration providing a tighter seal.

1-1/2” SHEETING NOTCH at base of concrete where panel site is designed into every building. Sheeting notch provides an air infiltration stop on blanket insulated building.

SEALANTS

SEALANT for roof sidelaps, endlaps and flashing at gable is provided to help insure weather tightness. Nominal 3/8” x 1/8” thick pressure sensitive tape sealant for ease of installation.

RIDGE CAP

LONG OVERLAP to help prevent water from siphoning into building.

TRIM AND FLASHING

All buildings are fully trimmed at rake (gable), corners, and eaves with standard trim material for a more finished look. This not only improves look of building, it is an additional deterrent to moisture, insects, and dirt from getting into the building.

PLANS AND DRAWINGS

ANCHOR BOLT setting plan, building reactions for foundation design, Erection Manual, and Engineer

Letter of Certification is provided shortly after receipt of deposit for building.

ERECTION DRAWINGS provide step by step instructions for case of assembly by dealer or customer.

ENGINEER CERTIFIED APPROVAL DRAWINGS including wall and roof framing diagrams, cross sections, sheeting, and flashing details are provided. These drawings clearly show the proper erection and assembly of all building components.

ALL PARTS ARE NUMBERED A part number is placed on each component (not including sheeting,screws, etc.). These part numbers coincide with a detailed listing contained in the bill of materials that come with your building. They same numbers are also used on the drawings for clarity and to help with assembly on the jobsite.

FOUNDATION PLANS  – WE HAVE: Certified Foundation Plans (additional cost) for the following states: WA, OR, CA, ID, NV, AZ, WY, UT, CO and NE.  

 

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Rollup Doors 1 or 2 Insulated Roll Up Doors Included - sizes as noted in Key Features of your chosen building size. 1 or 2 Insulated Roll Up Doors Included - sizes as noted in Key Features of your chosen building size. You Select as many as are physically possible - sizes range from 8x8 through 18x16
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Insulation Fiberglass or Reflective Roof and Wall Insulation included - As noted in Key Features of your chosen building size. Add in your choice of Fiberglass or Reflective Roof and Wall Insulation if desired. Add in your choice of Fiberglass or Reflective Roof and Wall Insulation if desired.
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