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How to set out a deck

Deck set out using hurdles, string and timber.

Overview

Decks can be a great way to elevate your outdoor living space. Once you’ve planned out your deck, the next step is to set it out. Here’s how.

Safety tip: Always wear the appropriate safety equipment (safety glasses, ear muffs, gloves and a mask, for example) and always follow the instructions for the product or equipment.

Steps

1Mark out deck area

First, mark out your decking area with marking paint. This way, you’ll know exactly where to place your hurdles. Also, it’s a great way to visualise the deck and to make sure you’re comfortable with the overall size.

Man marking the deck area to be set with marking paint.

2Create hurdles

Hammer hurdles into each corner of your decking, and screw timber onto the hurdles.

Pro tip: Position your hurdles away from the deck to allow enough room to work.

Green Bunnings hammer
Safety tip: Hurdles are sharp, so always add safety caps to the top of your posts.
Man hammering hurdles on each corner.

3Run the string line

Use a string line to create the shape of your deck. Make sure you’re happy with the dimensions. Once the string line is in place, check that your deck measurements are square.

Man running the string line to create shape of deck.

4Check if squared

Use the diagonal or ‘3, 4, 5’ rule to make sure your deck is square.

Green Bunnings hammer
Tips: The diagonal rule works by measuring from one corner to the other and repeating the steps on other corners. If the measurements are the same, it means your deck is square.
The 3, 4, 5, rule works by going to your corner and marking out three metres in one direction, and measuring out four metres in the other direction. When measuring between those two points (completing a triangle), the length should equal five metres.
Man measuring the string length to check if it is squared.

5Now you’re ready to begin building

The third step in our seven-part series on How to Build a Deck is how to install stumps. 

Health & Safety

Asbestos, lead-based paints and copper chromium arsenic (CCA) treated timber are health hazards you need to look out for when renovating older homes. These substances can easily be disturbed when renovating and exposure to them can cause a range of life-threatening diseases and conditions including cancer. For information on the dangers of asbestos, lead-based paint and CCA treated timber and tips for dealing with these materials contact your local council's Environmental Health Officer or visit our Health & Safety page.

When following our advice in our D.I.Y. videos, make sure you use all equipment, including PPE, safely by following the manufacturer’s instructions. Check that the equipment is suitable for the task and that PPE fits properly. If you are unsure, hire an expert to do the job or talk to a Bunnings Team Member.