How to set an upright
Using stirrups or uprights to support a post out of the ground is a great way to provide longevity for your fence or structure as the wooden post is less likely to suffer any rot.
If you are setting uprights or stirrups to install a pergola post or posts to support a roof structure please refer to the pergola manufacturer to ensure bagged concrete mix is appropriate. If a defined strength of concrete is required then its time to have pre-mixed concrete delivered via a truck.
Materials you will need
- Bags of Concrete Mix 20kg
- Uprights or stirrups
- Fence posts
- Clean water
Tools you will need
- Spirit level
- Tape measure
- String line
- Post shovel or long handled shovel
- Measuring jug
- Hose or bucket
- Spray marker paint
- Rod for tamping
A quality blend of cement, aggregate and sand, designed for use in projects where
Before you get started
- Read the Hints & Tips section
- Ensure there are no pipes or services below the ground; contact Dial Before You Dig on 1100 or via their website www.1100.com.au for advice on the locations of submerged pipes and cables.
- Use our simple Calculator to work out how much Concrete Mix you will need for the project.
Before you begin any project, please ensure you protect yourself with the following:
Look after yourself properly
- Protect your skin and eyes. Cement based products are alkaline and can cause burns to exposed skin or eyes.
- When working outdoors, be SunSmart - Slip on some sun-protective clothing – Slop on sunscreen - Slap on a hat - Seek shade - Slide on some sunglasses.
- All 20kg bags of cement products require 2 people to lift them safely. Always follow safe lifting procedures to avoid injury. So you will need a friend to help you handle the 20kg bags of Concrete Mix.
How to set an upright or stirrup using Concrete Mix
Step 1: MARK OUT THE UPRIGHT POSITIONS
Step 2: DIG YOUR HOLE(S)
Refer to our simple Calculator to work out how much concrete product you will need.
Step 3: SOAK THE HOLE(S)
Step 4: MIX CONCRETE & WATER
Step 5: ADD CONCRETE & TAMP WELL
Tip: Tamping is essential to remove air pockets and achieve a solidly set upright every time.
Step 6: SLOPE THE SURFACE
Step 7: ALLOW CONCRETE TO SET
Hints & tips
- The ambient temperature can affect the setting times of all types of concrete. If the temperature is less than 10oC, wait until the day becomes warmer and if its over 35oC then postpone the job until it is cooler.
- If a particular job calls for a specified strength of concrete i.e. 20 MPa, then its time to call in the experts and have concrete delivered from a ready mixed truck – it’s the only way to guarantee the structural strength in the concrete. Megapascals (MPa) is the common unit for indicating the compressive strength of concrete.