How many joists should lateral restraint straps be attached?

Straps should be fixed across at least three ceiling joists as shown in NHBC Standards Chapter 7.2 clause 7.2. 8 – Restraint. Restraint straps should be provided. They can be on one side of the wall only (at the higher ceiling level), unless the design shows that strapping to both sides is required.

Why is lateral restraint needed between wall and floor?

Lateral restraints provide a solution to bulging brickwork by restraining the whole of the brick outer structure of a wall to the internal floor joists. This fix is carried out from external to internal in situations when the joists run parallel to the bowing wall. Looking for remedial wall ties? Browse the range.

What are joist straps for?

Joist Hangers, as the name suggests are designed to hold timber joists in place. They are used to anchor things like decking, floors and ceilings. Most joist hangers wrap around three sides of a wooden beam and nails or screws are put into the holes to keep it in place.

Do you need restraint straps?

Lateral restraint straps are required at floor and rafter or flat roof member levels. If you are building a pitched roof you will also need to use straps at ceiling joist levels.

What are gable restraint straps?

Straps provide most of the lateral stability to the gable wall and are nearly always required. They must engage a full block on a gable, and will need to be fitted to the underside of the rafter members.

How do you combine two beams on a post?

Joining beams over posts can be done by either cutting a notch out of the post and splicing the beams together over the notch or by butting the ends of each beam together on top of the post and joining them using galvanized metal post caps.

What are lateral restraint straps for?

Lateral restraint straps are required at floor, rafter or flat roof member levels and in pitched roofs at ceiling joist levels. The masonry walls would also benefit from the lateral restraint by restricting movement of the separating walls and gable walls.

How do you use restraint straps?

Best practice of lateral restraint straps

1. Ensure all restraint straps fit tightly against the masonry face within the cavity.
2. Use blocking in the gap between the joist / rafter and the parallel wall at all lateral restraint strap positions as well as in between joist / rafters for the length of strap required.

What distance do restraining straps need to be apart?

2m apart
Even if you are using pre-fabricated roof trusses, Part A of the Building Regulations and BS8103 remain clear that tensions straps should be no more than 2m apart.