Need to know about concrete? Ask Andy
Our sales manager, Andy has been working in the building industry now for over 11 years. He’s been hugely instrumental in growing Online Building’s market share in concrete supply. By amalgamating a lot of customers’ orders that would normally be ordering as a once-off buyer he has secured better buying power with the concrete suppliers and in doing so he’s been able to leverage great prices. Andy handles the entire sale from start to finish keeping him in constant contact with the concrete supplier. We asked Andy to share some of his valuable knowledge about concrete.
What are the different strengths in the concrete we supply and can they all be pumped?
No, they cannot all be pumped. You can only start pumping from 25mpa upwards. The standard mixes are 15mpa (blinding and footings), 20mpa (foundations and slabs) 25mpa (slabs and foundations), 30mpa (foundations, decks, columns and beams), 40mpa (decks, columns, beams), 50mpa (decks, columns and beams, which are exposed to extreme weather conditions). The mpa required will normally be specified by the architect or engineer. There are also various additives that can be added to the concrete such as waterproofing products.
What typically causes delays in concrete orders and how can this be prevented.
We always ask for sufficient time to place the orders for the day the customer requires. The general rule is 5 to 7 days but sometimes we get lucky. I would also suggest that if you are needing a pump please ensure it is a morning-pour as there is always a chance of delays if the pump is completing morning-pours elsewhere.
We also suggest that the site has been signed off by the engineer for the pour before confirming the booking because if the site is not passed and the pour is delayed we could lose that spot and wait another 5-7 days for a slot.
There is also the Cape Town traffic issue. I would suggest you get the cubic metres as close to correct when the order is placed. It is not ideal to place a large final order, as a certain amount of trucks have been allocated to your order and they will have to then go back to the depot, load and then has to try to navigate through the traffic back to your site. This not only delays your job but the customers who are next in line for delivery.
Rule of thumb… concrete is essential to all builds and if you get the order right from the start, get the foundations laid correctly using the right concrete strength, the rest of your build should run smoothly. For all your concrete orders call Andy at Online Building on 021 712 1550 or go to our website, www.onlinebuilding.co.za.