First he tacks a double joist hanger to one end of the ledger and slips a side rim joist into place.
Squaring up a deck frame.
This is a crucial step that must be taken when building a house or when framing a simple deck.
Then he marks the top of the ledger 3 feet from the corner and the top of the side rim.
If the measurements match your frame is square.
If they don t push the two corners that are further away the long measurement back together a little and remeasure.
Slight tolerances can be adjusted before the joists are installed to prevent exaggeration.
It s a good idea to mark joist locations on the ledger and on the front facing rim joist before installation when you can lay the framing members side by side on a pair of sawhorses.
The foundation of a deck that rests on posts should be properly laid out which involves making sure the posts are square.
A sagging collapsing or crooked deck is not only unsightly but also potentially dangerous.
Speed squares and framing squares are helpful tools for using in construction builders often use them to check the layout.
Measure again before and after your first deck board is installed and every few boards as well to ensure it stays square while building.
Obviously the more square the frame the better.
Once installed it acts as a guide for a deck frame that s level and square.
One way this old house general contractor tom silva ensures that mason s strings and deck framing are square when he is building a deck is by employing the 3 4 5 rule based on the pythagorean theorem.
Using a square and a 4 level will also help verify that your deck form is level.
Compare the opposite lengths of the perimeter of squares and rectangle forms these lengths should be the same.
3 4 5 rule to ensure square layouts.
Some guys gals prefer to use the 3 4 5 method or the cross over method i use both.
Use the 6 8 10 or 3 4 5 rule to determine square or right angles in deck porch floor wall or roof framing or any other building framing or construction task to check a single corner for square use the 6 8 10 rule or if the sides are too short use 3 4 5 technique.
Anyone wants to learn the way to square a deck should know the 3 4 5 method as many builders often use it to make sure they are building a square deck.
