Main Support Beams & Telepost Adjustments

Did you Know?

If you notice that the basement drywall is beginning to crack or your doors are sticking or binding, this may be a sign that the teleposts in your basement need to be adjusted. Careful detailing that allows for the main beams in your home to expand and contract can help reduce drywall cracking in a finished basement.

Adjustable steel jack posts or “teleposts” are used to support the main beams in the basement. These posts transfer your homeʼs weight to the foundation of the home. The bearing plate at the top of these teleposts should rest snugly beneath the beam. Once a year, check the supporting beams to make sure they are still supporting the beam. If you notice a gap, adjust the nut on the upper jackscrew to close the gap. Check the level of the beam using a 4-foot long level to ensure that weight is evenly distributed among the posts. Any uneven pressure on a beam can cause problems with your home in later years.

If you plan to complete an unfinished basement in your new home, consider framing that allows a small space or gap between the plate of the partian walls and the floor joist to allow for upward movement of the floor slab. Alternatively, use a double plate system to allow for movement. This also lets you access and make adjusts to the teleposts when needed.

Moisture beneath the concrete basement floor slab may cause the earth under the slab to swell, lifting the telepost. If this occurs, adjust the telepost downward to level the beam. If the earth under the slab dries or settles, you may need to adjust the telepost upward so that it can provide proper support for the beam. Adjust the telepost very gradually to prevent drywall damage on the main floor.