Glossary

If you have already started shopping around for a new shed you may have been confronted with a few terms, some you may know and others you may not. To assist, we have compiled a glossary to help you talk our talk.

  • Apex: The apex is the highest point of the shed – and is where the rafters join at the peak. 
  • Apex Brace: (collar tie in tension) Aids in maintaining structural integrity in higher winds and larger buildings. It is a horizontal positioned C-Section used below the peak of the rafters. 
  • Apex Bracket: Plate used to join rafters at the peak of the building.
  • Barge Capping: Used to cover the gap between the roof and the end wall sheeting on gable ends.
  • Base Plates: Angle brackets used for fixing the columns to the footing/slab.
  • Base Metal Thickness (BMT): This is the thickness of the steel sheeting, minus the paint and coating. This measurement should be on all steel kit building quotes.
  • Bay: A bay refers to a part of a building marked off by vertical elements, such as columns. 
  • Building Code of Australia (BCA): The regulatory body that sets the guidelines for building and engineering standards in Australia.   
  • BOM: Is your bill of materials, which effectively is a list of all your shed’s parts and the quantities of each item, lengths, usage and component descriptions. You will need to check the BOM off when your shed, garage or home kit is delivered.
  • C-Section: Just like the name suggests, this is a steel purlin is shaped like the letter C. 
  • Cladding: Is all your steel sheeting that covers your building – both the walls and the roof.
  • Class 1a Buildings: This term refers to buildings to be used as liveable dwellings, for example our range of steel kit homes.
  • Class 10a Buildings: This classification is assigned to non-habitable buildings such as garages and sheds. 
  • COLORBOND® Steel: Is a type of coloured steel produced and manufactured by the iconic BlueScope Steel in Australia. 
  • Column: A column is the vertical C-Section of the portal frame that makes up the side walls.
  • Column in Concrete (CIC): Due to certain structural requirements, the engineer may deem it necessary to embed the column bottoms into concrete. 
  • Cross Bracing: Is a flat strap component used to reinforce your shed's structural integrity. 
  • Corner Flashings: Cover material in an 'L' shape placed vertically in corner situations.
  • Fixing Brackets: A general purpose bracket for attaching girts, mullions, headers and other components.
  • Footings: Foundations formed with reinforced concrete and placed under each column and mullion. Footings are placed regardless of whether a slab is being installed.
  • Gable: The end wall that is peaked. It does not have the gutter attached but is instead finished off with the barge capping.
  • Girt: Folded section that is fixed horizontally to the columns and mullions.
  • Gutters: Are attached (under the eaves) to the walls of your steel building, and are designed to guide rainwater to tanks and away from the building. 
  • Haunch Brackets: Are used to connect the columns and rafters and are either left-handed or right-handed. 
  • Importance Levels (IL): Is determined by how you intend to use your shed, where it will be erected and the overall risk it poses to human life and other structures in the event of structural damage. 
  • Insulation: This is an optional extra that is used to help control the climate in your shed, keeping it cooler in summer and warmer in winter. 
  • Knee Brace: A C-Section that joins the rafters and columns, and strengthens the connection. 
  • Open Bays: As defined above under ‘Bay’ but with no door or wall. Open Bays are generally found on rural buildings like farm sheds. 
  • Personal Access (PA) Door: Personal access door is a metal door similar to a residential front door, and is usually the main access point for foot traffic. 
  • Portal Frame: Is a combination of the columns, rafters, apex and knee brackets – which makes up a frame or skeleton of the building. 
  • Rafter: The C-Section connected to the column tops on both sides and joins at the apex of the building. On larger buildings these may be back to back. 
  • Region: The location you plan to build your shed. The region is a hugely important factor, as it will help us identify IL and wind speeds, which in return will allow us to apply the appropriate engineering and specifications to your steel building.
  • Ridge Cap: The is the folded flashing that covers the gap between the roof sheets at the ridge or peak of the building.
  • Roof Pitch: The slope or angle of your roof. 
  • ShedSafe: Is an industry body set up to benchmark the engineering of sheds and garages, to ensure they comply with the stringent codes and regulations as set out by the Building Code of Australia (BCA). 
  • Skillion Roof: A flat roof that is on an angle, with one end higher than the other with a very slight slope. 
  • Span: This is the distance or width between columns on opposite ends of the building, providing for a clear span. 
  • Terrain Category: The category assigned to the design of your shed, based on the site location and it’s surrounds. 
  • Topographic Factor: Identifies any slopes or hills at your site, and assessing the altitude, slope and direction.  
  • Wind Speed: The wind speed for your area will have a major impact on the engineering of your building, and is important for your safety and those around your steel building. 
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