Bellmont Façade Engineering inspected the internal cracking occurring within a unit in Manly.
It was concluded that the internal cracking was likely caused by the weight of bricks that hold down what are called tie down supports. Such supports secure the roof and provide resistance against wind uplift.
In this unit, strong multi-directional winds caused movement of the tie down supports which ultimately caused the horizontal cracking within brickwork.
Alternatively, the cracking could’ve also been a result of the corrosion of steel elements, a.k.a. ‘rust jacking’, where the displacement of building elements occurs due to the expansion of steel.
We recommended the following:
- Inspection of the remaining upper level units of the complex to ascertain whether similar cracking is visible on the interior rendered & exterior brick walls (where access is provided).
- Creation of a series of investigation holes in the walls (from inside the occupancy) to facilitate use of a bore scope camera to view the condition of brick ties and tie down plates or straps used and assess the level of deterioration.
The scope of works includes:
A: Rooftop Repairs
B: Embedded Steel Fixing Removals
C: Steel support Beam Replacement
D: Steel Pillar Treatment
In solving these suspected issues Bellmont delivered the installation of new gutter brackets along the perimeter of the rooftop, removal of corroded pre-existing mild steel fixings, installation of new sheeting and flashings for skylight including complete weatherproofing, installed new sheeting accommodating existing vents and complete weatherproofing, as well as treatment of the steel pillars.
You may have heard the term Delamination before, but not really know exactly what it means. Delamination refers to a kind of mechanical failure in composite materials and steel. It’s characterised by the separation of a material into subsequent layers, therefore no longer being one solid object, but rather multiple; ultimately resulting in an unusable material.
With the large usage of composite and steel materials within the construction industry, it’s a fair concern. Part of what makes delamination so worrying is how insidious it is, in that it is a failure that occurs within the material; rarely seen on the surface making diagnosing the defect sometimes quite difficult.
The phenomenon can be caused due to a number of reasons and the impact it can have on a project can be devastating. Delamination causes the effected material(s) to lose a great deal of their strength, making their presence in a structure virtually useless.
Some common causes for Delamination are:
It is essential to stay vigilant when any defects present themselves in general, but even more so in the case of composite materials, as delamination usually appears alongside most other defects that affect these materials.
Most often, the only way to solve an issue involving delamination will involve the reconstruction/replacement of the material(s) that have delaminated.
There are a few ways to diagnose whether something is being affected by delamination however, most methods are destructive and involve invasive methodology to make the determination. A few non-destructive methods of ascertaining whether a material is being affected are to listen to the acoustics of the material in question. This can be done with the use of speciality equipment, or by getting someone who is experienced to generate a sound from the material (usually by tapping it with a hammer), and determining if the sound that comes back is ‘hollow’.
Delamination is a defect that we often come across and solve here at BellMont. If you’re in need of any diagnostic or remedial consultation do not hesitate to contact us so we can help you resolve your issues.
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Everyone has experienced a surface inside or outside their building rusting at least once, it’s an effect of time and conditions. In most instances, this rust appears red. However, this is not always the case, with rust appearing in different colours for various reasons. The most common rust colours are red, yellow, brown and black, which all indicate an issue with either the surface itself or its contact with the surrounding environment. Read on to find out more!
Red rust is a result of exposure to elements such as air and water. Unlike other rusts there are no visible rust runs or streaks as the affected area is usually affected as a whole by atmospheric conditions. Like black rust, this form of corrosion is formed when combined with salt.
Yellow rust usually appears in places of high moisture content where the affected area has been highly exposed to water over a period of time and has corroded as a result. The yellow rust stain usually appears to run or drip.
Unlike yellow rust, brown rust is a drier and crustier rust, formed as a result from contact with water and oxygen. It is similar to red rust, however, brown rust appears in patches rather than affecting an entire surface.
Black rust usually forms in a low oxygen environment. The black stains help to indicate where the issues are. For the example areas where the rust is, indicate a lack of oxygen. Black rust, like red rust can form as a result of contact with salt which causes corrosion.
Enquiry after enquiry, inspection after inspection followed by spec after spec. These are the most common building defects our engineers have come across over seventeen years of business.
To learn more about these issues and how to identify them, you can head to the issues index of our site. Alternatively, if you think you’ve already identified these issues in your building and require our assistance, get in contact with us. We’d love to help get your building back in its best condition!