CESCON were engaged to carry out a structural inspection at a double story residential property of Cardigan St., in Carlton. This property is a typical brick building with timber floors representing the construction norms of the 1970S.

The property owners were concerned due to a developing crack within an external brick wall. This crack had developed immediately after the 2021 Melbourne earthquake which is believed to have been its most likely cost.

Our engineers noticed, the subject wall is a double height external wall and has developed a crack at the junction of its connection to a perpendicular (back) wall. Furthermore, it is assumed that the wall is an unreinforced brick wall, propped at first floor level by the balcony floor structure and at the top level by timber framing forming the balcony shed/roof. It was noticed that the balcony shed as well as the balcony floor did not have any lateral bracing which is the primary cause of damage to this wall. Absence of roof and floor braces exposes the wall to overturning effects under earthquake or high wind (lateral) loads because it is disconnected from the lateral load carrying mechanism.

Based on the condition of the wall, crack width and the extent of the crack we advised the client that the crack might further progress in the future. The wall was therefore declared unstable and should be fixed at the earliest.

Our final recommendation included temporary propping and a strengthening/repair plan to address the issue.

WHAT YOU SHOULD KNOW?

The intense shaking caused by earthquakes can cause walls, roofs, and foundations to crack, leading to structural instability. In some cases, earthquakes can also cause total collapse of buildings.

It is crucial for homeowners to assess their homes for potential damage after an earthquake. Engaging a structural engineer is the best way to ensure a thorough and accurate assessment. Structural engineers have the knowledge and expertise to identify the extent of the damage and determine if the home is safe for occupancy. They can also provide recommendations for repair or strengthening measures to ensure the safety of the home in the future.

Homeowners should take swift action after an earthquake to ensure the safety of their homes. If you suspect damage, do not enter the building until it has been declared safe by a structural engineer. By engaging a structural engineer to assess potential damage after an earthquake, homeowners can rest assured that their homes are safe and secure.