How many rafter ties do I need?
Rafter ties amount to an additional framing member that runs above the ceiling joists and that connects opposing rafters. They are generally required every 4 ft., which means that you need a rafter tie only for every other pair of 24-in. o. c. rafters or for every third pair of 16-in.
How high can rafter ties be?
Older building codes permitted rafter ties to be installed very high above the top wall plate, as much as two-thirds the distance between the top plate and the ridge. The 2012 IRC now limits this to one-third the distance between the plate and the ridge.
Can you raise collar ties?
Quote from the video:
Quote from Youtube video: If you can if you need more room you can actually relocate them so let's say that you have a collar tight that's a little lower. But still in the upper 1/3 of the area.
Where do you put rafter ties?
Ceiling joists in most houses also serve as rafter ties. When rafters are perpendicular to the ceiling joists, rafter ties should be installed just above the ceiling joists. The joists usually lie beneath the ties. Rafters are usually installed every other rafter when they are constructed on 24 inch centers.
Do I need rafter ties and collar ties?
Collar ties are necessary to prevent separation of the roof at the ridge due to wind uplift. Rafter ties resist the forces caused by gravity loads that would otherwise cause the roof to pancake and push out the sidewalls.
How many nails are in a rafter tie?
To find the number of fasteners per connection, divide tie force by 100 pounds per nail (typical capacity of a 16d nail). As you can see, even at the plate, 15 nails are required for each connection in your 4/12 roof; move the rafter ties up and you’ll need 22 nails per connection.
What size nails for rafter ties?
While many hurricane ties have been evaluated with 8d x 1½” nails for compatibility with nominal 2x roof framing, some require the use of a longer, 8d common (2½” long) nail and others require a larger-diameter 10d nail.
Does a collar tie reduce rafter span?
Collar ties can be used used to reduce rafter span – they essentially provide intermediate support for the rafter, but only for roofs with a pitch of more than 1:3.
How do you put on roof ties?
Quote from the video:
Quote from Youtube video: To make sure the roof stays in place when severe winds blow securely anchor roof to wall connections by installing hurricane straps or clips at every wall to rafter connection.
Do hurricane ties go inside or outside?
Hurricane ties are usually installed on the home’s exterior to provide the most secure connection between the roof, walls, and foundation, ensuring the greatest possible resistance to upwind and lateral forces that can cause catastrophic damage to a building.
Can you use screws with hurricane ties?
Your local building inspector might approve construction screws rather than nails to attach hurricane strapping to tie down rafters to a top plate PROVIDED that the screws are properly-selected construction screws of the right size and length.
How many nails do you need for a hurricane tie?
The Simpson Strong-Tie H3 Clip is part of the Hurricane Tie System that features various configurations of wind and seismic ties for trusses and rafters. A typical H3 installation ties the single top plate to the rafter or truss. The Simpson H3 requires (8) 8d joist nails.
What are hurricane tie downs?
Tie-downs are systems of heavy-duty straps and anchors designed to stabilize manufactured homes (also known as mobile homes) during high winds. Failure to properly install and maintain tie-downs results in reduced capacity to resist sliding and overturning.
What are hurricane straps for roofs?
Hurricane ties will hold a roof on, right? When steel straps, commonly referred to as hurricane ties, are installed on a building, they are expected to secure the roof in place against wind uplift forces. Unfortunately, depending how hurricane ties are used, they may not provide the expected uplift resistance.
What is hurricane strapping?
For starters, Hurricane Straps are the metal ties that keep your roof trusses attached to your house. Look like the photo below and made of steel: This connection between your roof and the walls of your home is one of the most important and integral structural connections in your house.
Are hurricane ties required for decks?
Hurricane ties will not usually be required by your local building department, but they are a cost-effective method of securing your joists over a cantilevered beam that may be lifted by high winds.
Where do hurricane ties go on deck?
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Quote from Youtube video: Should always be attached with metal joist hangers to the ledger and at the other hand when the wood joists run over the beam they should be secured with hurricane ties or clips.
Where do hurricane ties go on a deck?
Hurricane Ties, also known as rafter ties, truss ties, or hurricane clips, are used for deck or roof framing to secure rafters, trusses, or joists to the wood framework.
