What is steel fixing?

Still fixing work involves following engineering drawings that detail the type of bar and the spacing used and setting out the work. The reinforcing bars are tied together with wire, which is cut using nips, or electric rebar tiers. Steel fixers are also responsible for attaching ‘spacers’ and ‘chairs’ that determine the amount of concrete cover.

Reinforced concrete (RC) is a composite material in which concrete’s relatively low tensile strength and ductility are counteracted by the inclusion of reinforcement having higher tensile strength or ductility. The reinforcement is usually, though not necessarily, steel reinforcing bars (rebar) and is usually embedded passively in the concrete before the concrete sets. Reinforcing schemes are generally designed to resist tensile stresses in particular regions of the concrete that might cause unacceptable cracking and/or structural failure. Modern reinforced concrete can contain varied reinforcing materials made of steel, polymers or alternate composite material in conjunction with rebar or not. Reinforced concrete may also be permanently stressed (in tension), so as to improve the behaviour of the final structure under working loads.

Slipforming

Slipforming techniques can bring time and cost savings, while retaining the high quality standards required in today’s market place, to projects such as service cores, towers, silos and bridge piers.

Delta Foundation utilises this system as it is one of the fastest methods of constructing vertical structures resulting in a rise of 7 – 8m per day on a (24 hr slide) and 3 – 4m a day on (day shift). This leads to reductions in construction periods and consequent cost savings when compared with traditional formwork or jumpform systems.

Slipforming can accommodate the most complicated structures and is not disrupted by adverse weather. Personnel are provided with a permanent safe platform to work off.

Drainage

Concrete drainage

As a specialist in forming concrete for driveways, patios and similar structures exposed to the weather, we are often asked questions about drainage. The basics of drainage are simple – water will tend to find its way from higher to lower elevations. Making sure it does so effectively can be a lot more complicated.

It’s an important topic, since insurance claims may be rejected if they result from a foreseeable failure of the insured’s drainage.

What are the typical consequences of poor drainage design in poured concrete?
Unwanted pooling of water after each fall of rain, or when you hose down the surface. When the pooling occurs near your house (for instance, puddles in front of your door) you risk it overflowing into your house, damaging floors, coverings and sometimes walls.