Roof Truss Ledger On Concrete Tilt Up Walls

Precast concrete walls however tilt up is the preferred and generally accepted term.

Roof truss ledger on concrete tilt up walls.

This one two punch delivers new buildings quickly and economically which might explain why more than 650 million square feet of tilt up buildings go up every year. Wood roof truss or rafter direct bearing connection. Drill holes for the expanding anchors every 16 inches or as specified by local codes insert the anchors hold the ledger in place and tap it with a hammer to indent the anchor locations on its back face. With the tilt up method concrete elements walls columns structural supports etc are formed horizontally on a.

Tilt up construction combines the strength and durability of reinforced concrete with the precision and efficiency of the design build methodology. Non load bearing tilt up wall panels are used to enclose a building frame and also may act as a shear wall. Anchor a ledger to a masonry wall with expanding anchor bolts begin by marking a line across the wall for the ledger s top edge. The ledger is needed to properly attach the perpendicular roof trusses to the top of the structure.

What is the best way to fasten the trusses to the existing wall. Walls that are constructed of concrete block that need to be covered with a roof will require the use of a ledger. The term tilt up building refers to any type of building that employs the tilt up technique for constructing the walls. A ledger is a horizontal board that is attached to the top of the the wall.

Aci 551r 92 describes tilt up as the tech nique of site casting wall panels on a horizon. Flush tilt up walls to achieve a flush tilt up wall and m i n i m i z e the joints panels extend over and hide the concrete or steel c o l u m n s. Fastening to masonry walls. In high wind i e greater than 110 mph three second gust or high seismic areas i e seismic design category d an extra metal connector is often necessary.

Cast in place connections p r ovide a strong continuous wall for shear resistance and re q u i r e the least amount of waterproofing. Lifting panels is always the most exciting time on a tilt up job but what comes after lifting is perhaps even more important to the proper performance of the structure. The building has concrete blocks walls and a flat roof. Fi g u re 4 shows four design va ri a t i o n s.

The most common tilt up procedure is to erect exterior walls first followed by the roof framing system. Tilt up tilt slab or tilt wall is a type of building and a construction technique using concrete though it is a cost effective technique with a shorter completion time poor performance in earthquakes has mandated significant seismic retrofit requirements in older buildings. The very nature of a tilt up building or any rigid wall flexible diaphragm structure is the interaction between the walls the roof structure and the floor or foundation. The owner is looking to install pre engineered roof trusses with a 5 12 pitch as the the existing roof is leaking.