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BellMont Blog

Nothing to Crack Up About

26/6/2018

3 Comments

 
Buildings are amazing structures, but sometimes even they crack under pressure…literally. While not all cracks require repairs they are definitely not an issue to crack up about as they can lead to serious structural issues if left untreated. Luckily, we are here to help with everything you needed to know about cracking.
 
Explanation:
Cracks are signs of release for a structure with built up stresses that assist contractors and engineers to identify the areas of weakness for the structure, so they know where to begin their rectification work.  
 
Types:
Shrinkage
  • Shrinkage cracks are usually created at the beginning of the construction process with the use of an inadequate concrete mix or rapid curing and are most commonly diagonal or vertical cracks. Although these types of cracks can allow water to enter through the wall causing internal stresses, they do not pose a threat to the structural integrity of the building.

Hairline
  • Hairline cracks like shrinkage cracks are created at the beginning of the construction process due to poorly mixed or poured concrete and likewise do not pose threats to the structural integrity. These cracks are usually spotted in the middle of a wall, where the wall is commonly at its weakest.
​
Settlement
  • Settlement cracks are caused by the failure to properly prepare the subsoil or compact the underlying ground.  These cracks are usually continuous and can appear multiple times on a wall, appearing wider at the top and narrower towards the bottom.

Appearance:
Vertical
  • Vertical cracks tend to appear multiple times and have various causes. If a vertical cracks appears straight it is usually due to shrinkage, making it a low risk crack and no cause for concern. However, if the vertical crack has ongoing movement and seems distressed, you should contact a structural engineer immediately.

Diagonal
  • Diagonal cracks can be caused by settlement issues, expansion and shrinkage and will appear differently depending on the issue. If a diagonal crack appears along almost all of the foundation it is usually due to a settlement issue, in particular with the footing on one side of the wall. If you are experiencing this issue you should get in contact with a consultant. If the crack is wider a at the top than the bottom this is usually an expansion issue. Lastly, if the crack is uniform and stays the same width the whole crack then this is a shrinkage issue which not something to worry about, structurally.

Horizontal
  • These cracks are usually identified in the centre of the wall and are most commonly signs of a foundational or loading issue created at the beginning of the construction process. In some cases these fine cracks can go unnoticed for years, which can have a negative impact on the structure of the building, in this instance a consultant should be contacted to evaluate the damage.

Floor Cracks:
  • Floor cracks are quite common and not a cause for alarm in terms of issues that will damage the buildings structural integrity, this being said they should still be repaired to prevent future complications. 
3 Comments
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10/2/2023 11:42:28 pm

Buildings are amazing structures that can withstand all kinds of weather, natural disasters, and everyday life. However, even these structures have their limits and sometimes can crack under pressure. As our world changes, so does the environment around us, and this can lead to extreme weather conditions and other conditions that can weaken the structure of a building. Earthquakes, floods, hurricanes, and other natural disasters can all cause damage to buildings, and if they are not built properly, they can crack and break apart. In addition, if the building isn’t designed to handle a certain amount of pressure, it can be possible for it to crack as well. As a result, it is important to make sure that a building is designed to handle the specific environment it is in and is built to the right standards to ensure it can withstand the pressure it will encounter.

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 PO Box 273, Petersham NSW 2049

  • Services
    • Civil and Structural Engineering
    • Heritage Buildings
    • Expert Witness Services
    • Waterproofing
    • Concrete Repair Investigations
    • Superintendent Services
    • Rope Access
    • Design Building Practitioner
  • Our Team
  • Case Studies
    • Facade Case Studies >
      • Bondi
      • Marrickville
      • Darling Point
      • Wollongong
      • Manly
      • Brighton Le Sands
    • Heritage Buildings Case Studies >
      • Chinatown Gate Refurbishment
      • St Sophia Church
      • Holy Trinity Greek Orthodox Church
      • Fortune of War Hotel
      • Spectacle Island
      • Ashfield
      • Rosebery
    • Waterproofing Case Studies >
      • Neutral Bay
      • Mascot
      • Summer Hill
      • Hurlstone Park
      • Rosebay
      • Lanecove
    • Structural Case Studies >
      • King Street Wharf
      • Rockwall Apartments, Potts Point
      • Kirribilli
      • Sydney Olympic Park
      • Surfers Paradise
      • Drummoyne
  • Accreditations & Suppliers
  • Blog
  • Contact