How To Wet Set Ledgers On Concrete Tilt Up Walls

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.

How to wet set ledgers on concrete tilt up walls.

Wet setting weld plates in tilt up panels. You can see this demonstration in the video above. Osha requires that precast concrete panels including tilt up wall panels be temporarily braced to prevent them from overturning or collapsing during construction title 29 code of federal regulations standard 1926 704. I m involved with a project that has tilt up wall panels with steel beam connection plates installed on the interior face of the panels.

Originally published september 1967. This is especially a concern at the control joints. He poured the panels into forms set in the only place where there was room where the building s foundation was going in. 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 tilt up expo featured an outdoor exhibition of technologies and we did an actual concrete pour into a sample tilt up panel that had fox tilt as underlayment and as a wet set array. To prevent the concrete from adhering to the molds contractors apply release agents or bond breakers to the mold before the concrete is poured. Precast concrete walls problems with conventionaldesign. The same provisions are presented in aci 318 14 but.

Since tilt up concrete professionals can easily handle both the hottest summer and coldest winter days there are few constraints on when to place concrete. Most walls and especially slender walls are widely evaluated using the alternative design of slender walls in section 14 8. I think it is a good idea however for roof ledger to be p t particularly if the possibility exists for moisture to wick through the wall. The design guide for tilt up concrete panels aci 551 states that tilt up concrete walls can be analyzed using the provisions of chapter 14 of the aci 318 11.

Each panel is supported by at least two braces throughout the duration of the shell construction. Other forms of precast. In a lot of tilt up type buildings however the roof structure is open and can dry out if the ledger does get wet. Tucker s idea was to turn things around and make the top of the pour the decorative face.

Concrete is an excellent building material and precast concrete is a quality factory produced product that gives great scope to the designer of a wall with respect to form texture and colour. As in all concrete markets the contractor must account for panel preparation performance of materials in the plastic and hardened state anticipated weather conditions and a safe jobsite. Traditionally the face surface of the tilt up panel is the bottom of the pour where the concrete meets the form.