How to Use Precast Concrete Piers
When setting the support beams for a deck, it is important that the beams are properly set and secured. If not, your deck can eventually warp, crack and split. Using precast concrete piers will strengthen the footing and make the installation of the support beams much easier. This simple project, that can be done in less than a day, will ensure that your deck is stable and safe.
Supplies
- Post Hole Digger
- Fiberboard Tubes
- Handsaw (optional)
- Gravel
- Level
- Concrete Mix
- Water
- Wheelbarrow
- Shovel
- Paintbrush
- Concrete Bonding Agent
Instructions
Before setting the precast concrete piers for your deck, you must already have your deck plans and know where the support beams should go. The number of piers and fiberboard tubes you will need depends on how many support posts you will have for your deck. After marking the location for each of the deck beams, you are ready to set the concrete piers.
1. Use the post hole digger to dig a hole that is the length and width of the fiberboard tube. Dig a couple of extra inches for the length to allow for the gravel. Most fiberboard tubes are 4 feet long and 8, 10 or 12 inches in diameter. If the tube is too long, it can be cut off with a handsaw.
2. Pour about 2 inches of gravel down into the hole.
3. Place the tube down into the ground and use the level to make sure that it is straight.
4. Pack dirt around the tube so that it stays in place.
5. Combine the concrete mix with water by following the instructions on the concrete mix. Mix the concrete in the wheelbarrow, if desired.
6. Shovel the mixed concrete into the center of the fiberboard tube.
7. Use the paintbrush to spread the bonding agent on the bottom 2 inches of the concrete pier.
8. Set the pier 2 inches down into the concrete inside the tube and make sure it is level.
9. Repeat these steps for the remaining precast concrete piers.
10. Follow the manufacturer's instructions on the length of time the concrete should set.