Reinforcing Roof Joists For Mep Units

Open web steel joists and joist girders for revised loading conditions.

Reinforcing roof joists for mep units. Lift up the new roof joist and press it into the construction adhesive on the broken piece. This is where a high pitched roof is necessary. Use 16 d common nails and make sure the tops of the joists are flush. Use 3 inch 16d nails and secure the 2 joists together.

A great deal depends on the pitch of the roof. A 2x6 roof joist old size sawn framing can support about 40 lbs. The first step to reinforcing the roof is to add an x to the frame. If you don t have an a frame roof you can run parallel boards between the studs to further offer support and to strengthen the frame.

Part 2 of this series will discuss and demonstrate methods to modify open web steel joists and joist girders to increase the load carrying capacity or repair damage. Tensile forces the type of repair procedure may vary. Therefore it is imperative that the building owner or general contractor notify the joist. Per square foot for live load.

Add the second header and direct nail this header through the trimmer joists. Once again a 2 by 4 inch piece of lumber is placed between the trusses and parallel to the ceiling joists. A higher pitched roof would be better for extra living space than a lower pitched roof. Use wood adhesive underneath the sheathing along the connecting joint with the roof trusses.

Space them four inches apart along the edges and six inches apart in the middle of the plywood sheathing. For a 10 span. Nail the double headers to each other three 16 d common nails every foot. It is usually best to locate a new unit away from existing units and near an existing bearing wall or girder limiting the amount of new load on the existing joists.

To reinforce these members the best option. Evaluation of joists and their typical reinforcement in. Per square foot for dead load framing and roofing and about 25 lbs. For example last month we visited an existing tilt up concrete building with steel bar roof joists for blue spruce design and construction.

Direct nail the first header in to the cut joist and through the trimmer joists in to the header. The other is just used to support the trusses. Per square foot at 24 o c. Connect roof sheathing to the roof framing with ten penny weight common or eight penny weight ring shank nails.

Continue reading below our video of the day. This webinar parallels the steel joist institute publication technical digest no. This alone will not hold the joist in place so you will need to nail them together.