Pad footings are a fundamental component of building foundations in Perth. A pad footing (also known as an isolated footing) is a square or circular block of concrete that spreads the load of a single column or post into the ground.
Our team constructs pad footings in Perth that provide a stable base for structures ranging from residential homes to commercial facilities.
We understand that a strong footing is crucial for the longevity and safety of any building, and we ensure each pad footing is engineered to support the specific loads and soil conditions of your project.
A pad footing is essentially a concrete ”pad”, often with steel reinforcement, that sits under a column or stump to distribute its weight to the soil. In Perth’s construction, pad footings are commonly used for supporting verandah posts, pergolas, carport columns, or even steel framing and shed posts. They are also used under building columns in commercial projects where point loads must be carried to the ground. Typically, a pad footing might be a few feet (or around 600mm to 1200mm) in width and depth, but dimensions vary based on the load and soil bearing capacity. We design each footing according to engineering requirements: the width is set so that the soil pressure is within safe limits, and the thickness is sufficient to prevent shear failure. Reinforcing steel (rebar) is placed within the footing to add tensile strength and crack control. By using Australian Standard N grade concrete (often 20 MPa to 25 MPa for standard structures) and proper reinforcement, our pad footings achieve the durability needed for West Australian conditions.
Our pad footing construction adheres to the National Construction Code and relevant Australian Standards, such as AS 2870 – Residential Slabs and Footings. This ensures the footings are suitable for local soil classes (sand, clay, etc.) and any site-specific factors. According to the Building Code of Australia, even relatively small structures benefit from correctly designed footings. For residential projects in Perth, typical pad footing sizes and depths are derived from standard tables in AS 2870, considering soil reactivity and loads. For instance, a patio post on a Class A (stable sand) site might use a 450mm x 450mm x 300mm pad footing with one layer of SL72 mesh, whereas a larger house column on a more reactive clay site would require a bigger and deeper footing, possibly with starter bars into the column. We ensure all our pad footings meet or exceed these standards. Moreover, we pay attention to details like embedding the footing below the ground frost line (not usually an issue in Perth’s mild climate) and below the topsoil to reach firm ground.
Our Perth pad footing construction process is thorough and efficient. We begin by excavating neat holes or trenches to the required footing size. The excavation bottom is trimmed and compacted if necessary, and we make sure any soft spots are removed or improved (e.g., by recompacting or using a gravel blinding layer). Next, we set up formwork or use the natural excavation sides if they are stable, to form the shape of the footing. We place reinforcement as per the engineering design, typically a reinforcing bar grid or cage, that rests on concrete block “bar chairs” to ensure correct cover from the soil. Then we pour high-quality ready-mix concrete, usually a 20 MPa structural concrete mix, which is standard for footings. Our crew vibrates the concrete to eliminate air pockets and ensure it fully surrounds the rebar. We finish the top of the footing level and rough (if an upright column will be cast on it) or smooth (if the pad will support a post base plate). Curing is critical for strength, so we keep the new footings damp and covered for a few days (or apply curing compound) to achieve proper hydration of the concrete.
Quality checks are performed at every step. We verify that the footing positions and levels are accurate (surveyed to match the building layout), and that the concrete mix and reinforcement match the specifications. Our team’s attention to detail ensures that each pad footing will perform as intended, safely supporting your structure for decades.
Perth’s diverse soil conditions, from coastal sands to clayey areas inland, make correct footing construction essential. Sandy soils drain well and typically allow smaller footings due to good bearing capacity, whereas clay soils can shrink or swell with moisture, requiring deeper and more reinforced footings. Our local expertise means we design footings suited to your site’s geotechnical conditions. Where needed, we can incorporate measures like deeper embedment or tie beams connecting pad footings (to create a more stable foundation system on reactive soil). We might also treat the ground by compacting or adding crushed rock under footings to improve support. Rest assured, our Perth pad footings are built to keep your structures stable and level over time, preventing issues like uneven settling or cracks in walls.
