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FAQ & Glossary

You are here: Home1 / FAQ & Glossary
  • Purchasing
  • Making Changes
  • Expect
  • Preparing to Receive
  • GLOSSARY

FAQ:

Purchasing a Metal Building System from Ostro Steel Structures

1. Does Ostro match other companies’ pricing?

Yes! We do our best at Ostro to offer highly competitive pricing when we send you a quote. If a competitor has sent you a written estimate for a lower price for the same specifications, please send it over! We’ll review the specs and advise you about any differences that might create a pricing discrepancy. If they’re the same, we’ll match or beat!

2. Are you a manufacturer or just a broker?

We are a manufacturer and would love to give you a shop tour anytime you like. Our 160,000 square foot facility is just outside beautiful Augusta, GA.  Please feel free arrange a tour with your Ostro estimator or just walk in!

Unfortunately, many other companies in the metal building industry aren’t so accommodating on tours—usually because they don’t fabricate buildings and therefore don’t have anywhere to tour.  Why?  Many of the online sellers who say they’re manufacturers are actually brokers who read you a script, buy from mega-factories, mark the building up 20-30% and then sell to you for a quick profit.

Our business model is different.  We take our time with you, discuss your project and get to know your needs.  We don’t pressure sell or chase the quick bucks.  Our reputation as a top tier advisor in the metal building industry is paramount to us, and we’re committed to getting it right for you, on time and on budget.

3. What kind of main frames do you your buildings have?

Our mainframes typically are a welded three-plate design with tapered columns and rafters. We’ve made huge investments in technology in recent years, so almost 80-90% of our welds are robotic to ensure quality and consistency on every product we sell. We offer a variety of finishes including red oxide primer, a lighter grey primer, and—for an additional fee—custom colors and even fully galvanized framing.

For smaller structures, we do offer a fully bolt-together and fully galvanized product that meets the same codes and loads as a welded frame building, but with a reduced cost.

4. Do you sell tube steel carports? How about pole barns?

We do not typically get into the super-light duty market or wood framed structures. Our pre-engineered metal buildings are entirely clearspan and made from high-strength steel for years and years of longevity and heavy use. We find the features and cost of our metal building systems strike the right balance for most customers.

Where reducing cost is the primary goal, however, we do offer a fully bolt-together and fully galvanized product that meets the same codes and loads as a welded frame building, but with a reduced cost. Offered solely in widths smaller than 40’, this product uses the same fully clearspan design as a traditional metal building system and the same highly durable 26ga exterior cladding and trim, but we’re able to offer it at a more attractive price by using highly advanced roll forming manufacturing processes.

Carports, while cost effective, just don’t offer the same specifications, quality or durability and therefore tend to be a shorter-term solution. The pole barn market does have some premium sellers that offer a nice product, although in general, this type of building still sacrifices a lot of ceiling space to large truss systems and tends to have thinner, less durable exterior sheeting.

5. What is the difference between hot dipped galvanized and galvalume?

Our secondary framing—meaning our girts and purlins—is offered with your choice of a red oxide or hot dipped galvanized finish to match your main frames. Hot dipped galvanization, a zinc-based coating, creates a protective rust barrier between your exterior sheeting and your mainframes.

Galvalume® on the other hand is a steel mill applied coating applied on all our exterior wall and roof sheeting. This coating—patented by Akzo Nobel®—is a mixture of aluminum and zinc and provides excellent corrosion resistance as well as self-healing properties. Our galvalume roof sheeting has an additional acrylic coating, whereas our painted wall sheeting is a Galvalume® substrate with a siliconized polyester baked on finish.

6. What is the best roof pitch? What is the most cost-effective roof pitch?

It’s tough to say what’s best in your zip code without doing some design work on our end. Unless you have high snowfall, steeper roofs require more material (and therefore generally cost more) than flatter ones. Steeper roofs also create more dead air space in the ceiling area, meaning higher HVAC costs over time. However, the look of a steeper roof often evokes a certain aesthetic that’s tough to resist.

7. What is your insulation made of?

Our insulation is made of two parts: (i) a fiberglass batt system and (ii) a factory-adhered vapor barrier and facing system. The thickness of the fiberglass can be tailored to meet your R-value requirements, and the vapor barrier layer comes in various materials with increasing durability. Unlike what you’d buy at your local big box hardware store with paper backing, metal building insulation systems are entirely inorganic, prohibiting mold and mildew from forming.

8. How do you attach your girts and purlins to the building?

Unlike other factories that make you bolt on all the girt and purlin clips on in the field, we employ a dedicated team of more experienced welder-fabricators who measure out and weld our metal clips on the main frames. That way, when the building gets to the job site, all you have to do is set the girt or purlin on the clip and bolt it together.

9. What size are the gutters and downspouts?

Our typical gutter would be 6” deep, but for areas with heavy rainfall, we also offer an 8” over-sized version. For snowy areas where roof snow tends to collect and pull-down gutters, we offer a variety of snow bars, snow spikes, and gutter guards to help your protect your gutters over time against the elements. Our downspouts come in two sizes—3” x 4” and 4” x 5.5”—and typically sit at each frame line.

10. What kind of standing seam roof do you offer?

We offer a trapezoidal double lock 24” standing seam profile. Our panels are mechanically seamed together in the field to prevent water from having any chance to get in. As the old saying goes, “at the end of the world, all that’s left will be the cockroaches and the standing seam roofs.”

As an additional service for customers in the Southeast, we offer a jobsite rolling service where we will roll your panels onsite to length so that they have no overlap or through fasteners whatsoever.

For a more residential look, we do offer additional standing seam profiles upon request.  Please ask your Ostro Steel Structures estimator for details!

11. How does wainscoting work on metal buildings?

For wainscoting using two different colors of PBR paneling, we would include a 16-gauge (or heavier) zee girt and a special 14-gauge (or heavier) angle at the intersection of two panel colors. This assembly allows for attachment of both panels and, when combined with a special trim, prevents the ingress of water.

12. How do stem walls, knee walls and partial masonry walls work on metal buildings?

We often would design for a partial masonry wall by using what’s called a “bypass” girt condition, meaning that your main frame is inset about 8” from the edge of your concrete depending on the depth of your masonry. This design allows for a 8” thick masonry wall with the metal paneling flashing to the outside edge of the masonry wall. Depending upon the height of the partial wall we also may need adjust the main frame specifications and design additional connections as well.

13. How does drywall connect to the girts?

There are a couple of ways to do it, and the decision probably will depend on your plans for plumbing and electrical. If you won’t have much plumbing or electrical in the wall, we can just locate our girts closer together (maybe 3-4 ft. on-center, for example), and then you would simply fasten the drywall to the girts with pancake head self-tapping fasteners. On the other hand, if you have a lot of plumbing or electrical needs, or just want more flexibility in your framing, you might consider skipping the girts entirely and installing a steel stud wall instead. This approach will allow you to locate, for example, you light switches or outlet boxes at any height, because the steel studs run vertically.

14. How do you design mezzanine column spacing?

Mezzanine framing depends on the required loading of the mezzanine floor. For example, heavier requirements for the mezzanine floor (such as for industrial machinery) would require either closer column spacing or larger columns or rafters. Ultimately, it’s a cost vs design question that our in-house engineer would help optimize. From a cost perspective, it sometimes is even the case that increasing the overall footprint of your building is cheaper than adding a mezzanine in a smaller-sized building.

As an alternative to a steel mezzanine, many customers design and build self-supporting wood framed mezzanines after the metal building shell is in place.

15. What are metal building drawings? Are they stamped by a P.E. (professional engineer)?

It’s kind of like the instruction manual that comes with a set of Legos®. The drawings start with the info you and your concrete professional will use to design a building foundation appropriate for your area. Then you’ll find pages dedicated to how the framing fits together, how the sheeting attaches to that framing and where your framed openings are located. Once you approve your design, one of our design engineers will stamp the drawings so that you can take them to your local building official to get your building permit.

16. Do you guys do foundation plans?

We’re happy to help wherever we’re licensed to do so. In the state of Georgia where our factory is located, we likely could do the foundation design for an additional fee. Outside of Georgia we would be happy to make a referral once your building drawings are complete. For a referral, you would work with a third-party engineer directly and provide them those stamped building drawings that come as part of your kit.

17. What type of foundation design and anchor bolts do you recommend?

There’s no one-size-fits-all approach. A lot of different designs can work depending upon your code requirements, soil and construction site conditions. We have seen our customers use monolithic slabs with perimeter turndowns, pier and footer designs with in-filled slabs and for smaller buildings even sono-tubes. Ultimately, we recommend you discuss appropriate options with your concrete installer to select the best fit for your site.

18. What are your warranties?

We offer industry leading warranties on our buildings, including:

  • 40-year limited rust-through perforation warranty on AZ55 Galvalume® roof panels
  • 40-year limited paint warranty against cracking, flaking or peeling
  • 30-year limited paint warranty against chalking and fading
  • Limited lifetime warranty on steel capped fasteners
  • 60-year warranty on steel beams (suitability of beams for local seismic, snow and wind loads in effect at time of order)

19. Do you provide construction services? Are you an erector?

Our sister company—CSBS Project Services—does offer erection services for metal building systems. In addition to our full-time, in-house crews, we work with a small but regular group of subcontracted crews to ensure that we can keep tabs on quality, cost and timeliness. When you’re working with your Ostro estimator to design your ideal metal building system, please feel free to ask for estimated construction pricing as well.

20. What if I have a sales tax exemption?

Many of our customers are tax exempt. We always include sales tax on the initial contract, but we only collect sales tax on delivery. As long as you provide your state’s sales tax exemption documentation prior to delivery, we can remove the sales tax from the delivery payment.

21. What form of payment can I use to pay for my building?

For the engineering deposit, we accept personal check, wire or credit card (with a small administrative fee charged on credit cards). The delivery COD payment must be paid by cashier’s check upon delivery or by wire prior to delivery.

FAQ:

Making Changes to your Metal Building System from Ostro Steel Structures

1. When can I make changes to my design?

  • Prior to receipt of permit drawings, changes generally are possible. Please contact your Ostro estimator as soon as possible.
  • Between receipt of your permit drawings and scheduling of delivery, changes may be possible, but the cost of making changes during this period may increase, as significant work has already been completed by the engineer and detailing group and drawings will need to be reissued and restamped. Please note also that changes made during this stage may take much longer to process, as much of the work completed prior to the change must be redone
  • After scheduling of delivery (i.e., signing booking letter), it may not be possible to make changes as the building may already have gone to fabrication. Please consult you’re your Ostro project manager as soon as possible.

2. What does it cost to make changes to my Ostro metal building system?

Change Orders are priced in accordance with the material cost, engineering time and detailing time required to fulfill them. Please contact your Ostro estimator or project manager for details.

3. Do I need to sign anything to make a change?

Yes.  Before any changes are made, you must sign a “Change Order” provided to you by your Ostro estimator or project manager.  Once this Change Order is signed, the factory begins any required rework. No changes can be made without a written change order

4. How long will it take to make a change? Will my delivery date be impacted?

  • The amount of time a change order will take typically is dependent upon the scope of the change, the proximity of the date of the change to the time of purchase and the length of the queue in the engineering and detailing teams at the time a change is requested.
  • Any changes typically will take a minimum of 2 weeks, but could take as long as 6 – 8 weeks (or potentially even longer for highly complex projects) to process

5. Will my changes be brought to the front of the engineering and detailing queue for immediate processing?

  • Out of respect for all of our customers’ timelines, please note that the changes to the building are processed by the engineering and detailing team in the order they are received. The engineering and design team may need to complete work on numerous other projects prior to beginning work on the requested changes.

6. What happens at the factory when I make a change to my Ostro metal building system?

  • When you make revisions or changes to your building there are a number of steps that must be taken
  • First, the building change order goes to the engineer to make the specifically requested changes, in addition to any related changes that are required in order to complete the specifically requested changes (i.e., changing door locations may change the type and quantity of support bracing in the building)
  • Second, the engineer will send his work to the detailer or draftsman to remake the drawings for the plant, which means several drawings for different stations in the plant
  • Third, change order is submitted to the checker—a senior draftsman who checks the work of the detailer
  • Fourth, the order is sent to manufacturing and is scheduled according to the dates that are available
  • These procedures are necessary to avoid any errors that could be made in the manufacturing of your building. This is why your delivery date would be changed

FAQ:

What to Expect After Placing an Order

1. When will I receive my permit drawings?

You will receive your permit drawings shortly after placing your order on the timeline communicated to you by your Ostro estimator. If you have to obtain a permit to erect your new building, please work with your local zoning or building code enforcement office to confirm all specifications. To facilitate this process, please ask our project manager to send you our sample “Code Confirmation Form”. Please let us know of any required adjustments in writing ASAP.

Please note that, while your construction drawings will include anchor bolt plans, you will be responsible for any required foundation and/or concrete drawings, as well as the anchor bolts themselves

2. What if I want to make a change?

Should you wish or need to make a change to your building specifications (i.e., adding architectural features or modifying framed openings), please refer to the FAQ section entitled: “Making Changes to your Metal Building System from Ostro Steel Structures”

3. How do I schedule delivery?

Once your permit drawings are completed, you will receive a call and an email from your Ostro project manager to schedule your delivery window. Please be sure to respond to this outreach, because we cannot ship your building without confirming a delivery window. You must sign this booking letter in order to have your building shipped.

4. What specific date will my building arrive?

Once your building nears completion, you will receive a call and/or an email from the factory to schedule your exact delivery window. Please be sure to respond to this outreach, because we cannot ship your building without confirming a delivery window.

FAQ:

Preparing to Receive your Metal Building System from Ostro Steel Structures

1. How do I pay my final balance?

You must tender the remaining payment for your building prior to or upon delivery. This payment must be made by wire or certified check. Please have your COD check present for the driver at the time of delivery. If there are multiple trucks or loads, the check must be remitted to the first driver unless alternative arrangements have been made with our shipping department in advance. You must tender this check to the driver before unloading your building.

2. How do you ship my building?

All of our buildings ship on flatbed trailers. Typically, we will send a 20’ – 25’ tractor with a 48’ – 53’ long trailer. Please ensure your site is designed to accommodate this type of delivery. If not, please let our shipping manager know as soon as possible so that we can attempt to load on a smaller “hotshot” trailer. To ensure we offer you competitive rates on smaller buildings, we may sometimes deliver using community freight. As a result, your building may be shipped with up to three other buildings going to other Ostro customers in your area.

3. How big does my jobsite need to be to accommodate your delivery truck?

Your delivery route and site must be able to accommodate a 20’ – 25’ tractor with a 48’ – 53’ long trailer.  The truck and trailer combined may weigh up to 80,000 lbs. and may be as tall as 13′.  The truck furthermore must be able to turn around.  Please advise customerservice@ostrostructures.com if there are any restrictions or limitations on your delivery route or if you have any questions about the accessibility of your unloading site.

4. What type of unloading equipment will I need?

Ostro’s delivery trucks are not equipped with unloading equipment, you will need to have a fork-lift or other unloading equipment available upon the truck’s arrival.  Most construction customers will use a telehandler rated at or about 6,000 pounds of lifting capacity.  Some loads can be tall, so a fork-lift that extends to 12’ is required.  Please also note the sheeting bundles, trim and hardware boxes may weigh as much as 4,000 pounds each and main frame columns and rafters may exceed 6,000 pounds.  If required, your Ostro project manager can advise as to the heaviest pieces you will need to unload.  Please reach out to customerservice@ostrostructures.com in advance of delivery to confirm these details.

5. How long do I have to unload?

Once the truck arrives, you will have two (2) hours to unload your building from the truck.  Based on our experience, it typically takes approximately 30 to 60 minutes to unload a building.  If you exceed two (2) hours, you may incur detention fees.

6. When will my accessories arrive?

Unless a prior arrangement is made and accessories are fully prepaid, all accessories (i.e., doors, windows, insulation, etc.) will arrive approximately 2 weeks after the delivery of your building.  Lead times are dependent on 3rd party manufacturing schedules; for more details please contact customer service.

7. What if I believe I’m missing items or I see something that may be damaged?

Please use your bill of materials to inventory your items promptly upon delivery of your building. If you believe any items are damaged or missing upon delivery, you must notify the truck driver and note any damage or shortage on the delivery paperwork.  If you find any items to be missing subsequent to delivery, you must notify customerservice@ostrostructures.com with 30 days of delivery.

8. What if I plan to ship my building outside the U.S. from the port?

If your building is shipping to port or will be loaded into a container, please call or email customerservice@ostrostructures.com immediately for further instructions, including with respect to scheduling and COD requirements.

GLOSSARY:

Plain English, please! You know I don’t speak metalbuilding-ese. What the heck do all these terms mean?

Accessory

Something you order along with your Ostro Steel Structure which supplements the basic components of the building. For example, doors, windows, canopies, translucent panels, etc.

Anchor Bolt

Bolts that are used to anchor your Ostro Steel Structure to its foundation or other support.

Anchor Bolt Plan (or “AB’s”)

A birds-eye plan view drawing showing the locations of the anchor bolts required to install your Ostro Steel Structure. This page should be read in conjunction with (i) your base plate details to determine anchor bolt diameters and base plate dimensions and orientations and (ii) your column reactions (magnitude and direction) to facilitate foundation design and planning.

Drawings

There are several different types of metal building drawings, each intended for a different purpose or reader. You may receive all or some of the below drawing types as you work with Ostro Steel Structures to design, order and receive your new building.

  • Approval Drawings: Approval drawings are just that—a preliminary set of drawings we may send you before or after you place an order so as to confirm details and allow you to approve a design.
  • Permit Drawings: After you place an order, you will receive a set of permit drawings. These drawings, stamped by one of our design engineers, typically would be taken to a local permit office in order to obtain a building permit.  Please use this meeting with the permit office as an opportunity to confirm code and load requirements, such as wind speed, snow load and seismic criteria.
  • Construction Drawings: Before we fabricate your Ostro Steel Structure, our Drafting and Detailing team will “detail” your building, literally counting the bolts, nuts, and screws, verifying all connections between steel members, confirming measurements, and more. As part of this process, a final set of construction drawings is created to give you a piece-by-piece assembly drawing for erecting your Ostro Steel Structure. This set typically is not stamped, but can be if your county so requires; please just let us know!
  • As-Built Drawings: Sometimes, typically on large, commercial projects, unforeseen conflicts among architectural blueprints, MEP diagrams, our metal building constructions drawings may occur, necessitating field changes to the building (i.e., relocating a window to accommodate additional conduit). In this case, we work with our clients to develop an “As-Built” drawing set for posterity.  This as-built drawing set reflects any field modifications completed in the field during construction and is particularly helpful to the owner several years down the road as he or she is considering an expansion, retrofit or other modification to the building.

Automatic Welding

Automatic welding is the use of machinery to complete welding procedures. The heart of our weld shop is a submerged arc pull-through automatic welder. This machine, some 200’ long is used by our craftsmen to assemble the mainframes of a given metal building system and completes some 80-90% of the welds on our mainframes, ensuring consistent weld sizing, location and quality.

Bar Joist

Also called “open web steel joist,” bar joist is a type of support member you might seen supporting the floor of a mezzanine manufactured by Ostro’s Legion Mezzanine division.

Base Angle

A base angle is a 16ga L-shaped member that is fastened (typically using drive pins) to the perimeter of your concrete pad, on the one side of the “L,” and to the base of your wall sheeting on the other. This secure attachment method is use in conjunction with a series of foam closures to prevent dust, rodents and more from entering your Ostro Steel Structure.  Ostro takes the typical L-shaped base angle one step further and offers as standard a deluxe version that conceals the sharp points of the screws at the base of your building, preventing injury to you, your visitors, and pets.

Base Plate

Base plates are thick steel plates welded to the base of the columns of an Ostro Steel Structure. These plates are pre-punched to fit neatly over the anchor bolts installed in your concrete foundation as provided in your Anchor Bolt Plan.

Bay

A bay is simply the space between your mainframe columns (from rigid frame to rigid frame, sometimes said to be measured “normal” to the frame). Typically, it is most efficiently to set the mainframe columns about 20-25’ apart, but this distance varies based on the region where the building is to be erected and your specific requirements for framed openings (i.e., doors and windows)

Bill of Materials or “Shipper”

The bill of materials or “shipper” is a list of all the components in your Ostro Steel Structure. It includes a listing of main frames, purlins and girts, wall sheets, roof sheets, hardware and more.  This document also give you the exact length of each piece, which can be helpful in the field for identification purposes if a part mark sticker is accidentally removed prior to installation.  The bill of materials also serves as a primary shipping document that will allow you to confirm that you have received and organized at your jobsite all pieces of the system.

Bracing

In an Ostro Steel Structure, you might see a variety of types of wind bracing. Most commonly, bays are braced using high-strength steel cable installed in an X-pattern.  These cables are used during construction to ensure framing members are installed plumb and square.  Once the building is erected, this cable bracing is one aspect of the system that prevents movement or sway during, for example, high wind scenarios.  Other types of bracing might use steel rod (also in an X-pattern), portal frames or wind bents (which use either hot rolled or welded steel members) or steel strapping that runs from girt-to-girt or purlin-to-purlin.

Building Code

Regulations established by a recognized agency to govern the type, specifications and installation methods for structures allowed to be constructed in a given geography. These codes may exist at the municipal, county, state or federal level.  Many jurisdictions will modify a common set of code provisions called the International Building Code, or IBC, published by the International Code Council.

Built-Up Section or Member

A built-up design is common for a rigid frame column or rafter in a metal building system. This type of design combines sections of steel plate and steel flat bar to form a “welded three-plate” structural member in an “I” shape.

Bypass Girt

A bypass girt, common on the sidewall of a metal building system, is mounted on the exterior flange of the column and therefore sits between the column and the wall sheet.

C or Cee Section

A cold-formed member of steel coil formed in the shape of a “C.” These sections commonly are used to frame openings in an Ostro Steel Structure, such as for door jambs and headers.

Cladding

Another term for exterior wall sheeting or roof sheeting on a metal building system.

Clip

A small piece of plasma cut steel with a punch pattern matching that of another framing member. This clip welded or bolted to a column, rafter or other framing member to connect with another framing member.

Foam Closure

A strip of self-adhesive foam shaped to match the corrugation pattern of a wall or roof sheet. This strip sits between, for example, the base angle and wall sheet to prevent the ingress of dust or rodents into the metal building system.

Cold Forming

Ostro uses the cold forming (or roll forming) process extensively in producing steel building systems. This process passes flat steel coil through a large machine with several stages of rollers that slowly modify the flat profile into a useable shape.  For example, Ostro cold forms C and Z shapes for purlins and girts, PBR paneling, standing seam (Ostro-3000) panels, and a variety of trim pieces.  Cold forming allows for extreme consistency in shapes, ensuring each piece you receive with your Ostro Steel Structure fits perfectly with the next.

Collateral Load

The weight of additional permanent materials beyond the basic materials needed for assembling a metal building system. For example, your estimator at Ostro Steel Structures will ask you about whether you wish to attach lights, insulation, ductwork, conduit, fire suppression systems, fans and other items and will use this information to increase the collateral load of the structure to account for this weight.

Column

A main frame member used vertically on a building to transfer loads from the main roof beams or rafters to the foundation.

Component

An individual part of an Ostro Steel Structure (i.e, a girt).

Connection

A point at which one structural member connects to another structural member.

Curb

A roof accessory that provides a weatherproofed attachment point for a roof-mounted item, such as a skylight or mechanical equipment.

Dead Load

The loading required to support the components of the metal building systems itself (i.e., framing members).

Driller Screw

Also called a panel screw, this longer fastener (typically 1-1/4”) is used to attach an exterior panel to a purlin or girt.

Eave

Along the sidewall of a metal building system, the eave is the point where the roof system meets the wall system.

Eave Height

The distance from finished floor to the eave.

Eave Strut

A specialized framing member situated at the eave to support both roof and wall framing.

End Wall

An exterior wall of metal building system that sits parallel to the rigid frame members. Commonly, the end wall is the “gable side” of the building.

Engineer or Architect of Record

The Engineer or Architect of Record is the principal engineer or architect overseeing an entire project. This role captures oversight and coordination over all trades associated with a given project, such as plumbing, electrical, HVAC, site prep and, of course, the metal building manufacturer. As Ostro is just one trade among many in a given construction project, we do not serve as the Engineer of Record.

Erector

A specialized iron worker who assembles or erects metal building systems. Ostro’s sister company—CSBS Project Services LLC—is an erector and would be happy to work with you on estimating construction cost and timeline for your project.

Expansion Joint

On a longer structure, an expansion joint is used to allow metal to expand and contract as the ambient temperature heats and cools. Absent such a joint, this thermal-driven movement could cause damage to the structure.

Façade

An architectural layer on the exterior of a metal building system, typically used to cover the rake and eave of the building.

Flange

The flange of a given structural member is the projecting edge. On an I-beam, for example, it would be the two pieces that form the top and bottom of the “I”.

Flange Brace

An angled member that connects the rigid main frame to the purlins or girts in order to transfer load.

Flashing

A specialized type of trim to help weatherproof an area where two planes of cladding come together.

Flush Girt

A flush girt, common on the end wall of a metal building system, is mounted flush with the exterior flange of the column.

Footing or Footer

A foundation element, typically a pad or a mat, usually of concrete, located under a column, wall or structural member in order to distribute the loads from that member into the supporting soil.

Foundation

The substructure that supports an Ostro Steel Structure, typically out of concrete installed subgrade.

Framed Opening

A cutout in the cladding of an Ostro Steel Structure, such as for a door or window, that includes framing and trim.

Gable

On an end wall, the triangle portion that runs from the eave of the building to the peak.

Galvanized

A dipped coating of mostly zinc to enhance corrosion resistance.

Galvalume®

An Akzo-Nobel product, this is a semi-reflective, mill-applied coating to Ostro’s sheeting coils that combines zinc and aluminum to enhance corrosion resistance and provide additional durability.

Girt

A horizontal structural member—cold formed at Ostro’s facility—that is attached to a sidewall or endwall column to support exterior paneling.

Ground Snow Load

Measured in pounds per square foot, ground snow load indicates the likely weight of snow on the ground for a specific recurrence interval of snow (excluding drifts or sliding snow).

Header

The horizontal framing member at the top of a framed opening.

High Strength Bolts

A bolt made from steel having a tensile strength in excess of 100,000 per square inch.

High Strength Steel

Structural steel having a yield stress in excess of 36,000 pounds per square inch. Unlike the competition, Ostro Steel Structures uses a minimum of grade 50 and typically grade 55, far exceeding the 36,000 psi spec.

Hot Rolled Shapes

Unlike the cold rolled shapes like C’s and Z’s that Ostro Steel Structures forms on-site at our manufacturing plant, hot rolled shapes like I-beam, heavy angle or channel are formed while the metal remains semi-molten at the mill. At Ostro, e purchase these shapes from the mill and cut them to length using an industrial band saw.

Impact Wrench

A common construction tool used to tighten nuts onto structural bolts.

Insulated Metal Panel

Also referred to as “sandwich panel,” insulated metal panels combine exterior steel sheeting, interior liner panel and insulation all into one product. Offered in a wide variety of R-values, these panels can reduce installation time and complexity.

Insulation

A material used in a building to reduce heat transfer, be it from the outside in or inside out.

Jamb

The vertical framing member on each side of a framed opening.

Lap Screw

Also called a “stitch” screw, this shorter fastener (typically 7/8”) is used at the lap from one PBR panel to the next at their side lap.

Lean-To

A single-slope structure that “leans” against another for support.

Liner Panel

Many of our customer wish to install corrugated sheeting on the inside of their buildings as well as the outside. This interior steel sheeting is called liner panel and commonly is used as a protective layer (i.e., to avoid accidental punctures in insulation) or for aesthetic appeal.

Live Load

Particularly important for a Legion Mezzanine System, the live load of a mezzanine speaks to its capacity to carry load. All else equal, a higher live load on a mezzanine allows for placing heavier inventory or equipment on the mezzanine.

Louver

An accessory with slanted fins that allows for the flow of air into or out of a metal building system. Louvers can be fixed or opening/closing and often are combined with fans to support airflow.

Main Framing

In a metal building system, the term main frame refers to the system of welded rigid frame columns and rafters. Secondary frames, by contract, commonly refers to purlins and girts.

Masonry

Category of building materials including brick, concrete block or concrete.

Metal Building System

A complete, integrated system of components that depend on one another to form a complete building and manufactured to be easily transported to and installed on a project site. A metal building system primarily comprises main framing, secondary framing, wall sheeting, roof sheeting, trim and hardware.

Parapet

Common with Ostro Steel Structures’ retail building systems, a parapet is a wall section that extends above the roofline of a building, given the appearance of a flat roof to what actually is a sloped on. This design allows for the improved water-shedding ability of a sloped roof, while maintain a flat-roof aesthetic and allowing space for additional signage on the front of the building.

Peak

The top point of a gable.

Personnel or Service Door

Doors meant for human ingress or egress into or from a metal building system. Also referred to as 3070 (3’ x 7’) or 6070 (6’ x 7’) doors.

Purlin

A horizontal structural member—cold formed at Ostro’s facility—that is attached to a roof rafter to support exterior paneling.

Rafter

A primary frame supporting the roof system.

Rake

Similar to the eave, but on the end wall of a metal building system instead of the side wall, the rake is the sloped intersection of the roof and the wall.

Rake Angle

A specialized member designed to allow for attaching the top of wall sheets to the rake.

Ridge

The horizontal line of a metal building system running peak-to-peak from one side of the building to the other.

Rigid Frame

A typical design for a metal building system main frame, a rigid frame is a structural frame consisting of members joined together with moment connections so as to render the frame stable with respect to the design loads, without the need for in-plane bracing.

Roll-Up Door

A common accessory that comes in a variety of sized, a roll-up door is a large access door that opens vertically.

Roof Live Load

The live load of a roof is typically tailored by reference to (i) the weight of workers and tools for any ongoing maintenance, and (ii) any other materials on the roof of the building expected for the life of the structure (other than snow, wind, seismic and dead loads).

Roof Slope

Typically measured in terms of rise and run, a roof becomes steeper as the rise increases relative to the run. For example, a 1:12 pitch roof increases in height by 1 foot for each 12 feet of horizontal run.  A 4:12 pitch roof, by contrast, increases in height by 4 feet over that same 12 feet of horizontal run.

Roof Snow Load

The load put on the roof by the accumulated weight of snow on a metal building. Often, roof snow load is calculated by reference to an allowable “reduction factor” that relates the ground snow load to the roof snow load, with the roof snow load being lower due to the pitch of the roof shedding snow.

Screw Down Roof

The most common specification for the roofing system in an Ostro Steel Structure, a “screw down” roof is a system where the installer fastens roof sheets to the purlins of a building using self-drilling screws. Unlike the competition, Ostro supplies only stainless-steel capped fasteners for increased longevity and durability.  All of our screws have a neoprene washer attached to create a seal at each point of penetration.

Secondary Framing

In a metal building system, the term secondary framing commonly refers to purlins and girts. Main Framing, by contract, refers to the system of welded rigid frame columns and rafters.

Seismic Load

A lateral load acting in a horizontal direction on a structural system due to the action of an earthquake.

Self Drilling Screw

A fastener which combines the functions of drilling and tapping for easy installation through steel sheet.

Side Wall

An exterior wall that runs perpendicular to the frames of a metal building system.

Sill

The bottom framing member in a framed opening.

Single Slope

A roof that slopes only in one plane, as opposed to, for example, a double-pitched roof like a gable that slopes in two directions away from the ridge.

Standing Seam Roof

A roofing system that, rather than attaching by fastening directly to the purlins, instead is mechanically seamed onto a series of clips that are screwed into the purlins. Ostro Steel Structures offers a standing seam roof system to boost durability, longevity and weather protection to the next level.  Rollformed in-house by our craftsmen using our Ostro-3000 panel profile in thicker 24ga steel, this upgraded system comprises a series of high-strength, 3” trapezoidal rib panels that are permanently and mechanically interlocked both with each other and to a system of field-installed roofing clips.

Wainscot

An aesthetic offering at Ostro Steel Structures that allows you to specify two wall colors on the same building, one at the bottom of the wall (for the first 3-4 feet, for example) and another color above it. Many customers also use masonry as a wainscot at the bottom, with steel paneling above.

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