When Age Is Not Just a Number: New Roofs and Premature Aging (90 visualizações)
When Age Is Not Just a Number: New Roofs and Premature Aging
Postado em 09/03/2019 12:59 por danielkamesh33
Drainage correction Ted’s woodworking Review in areas of ponding water within 10 feet of the structure should be addressed by the engineer. Poor drainage can cause the crawlspace area to accumulate standing water especially if the ground surface elevation underneath the floor is lower than the exterior ground surface elevation, A french drain is usually recommended to address drainage issues around the foundation where your trying to lower the water tabPier and Beam foundation are classified as deep foundations. They have builders piers beneath their exterior grade beam. The pre-construction piers are installed before the exterior footing of the grade beam is poured giving the exterior beam extra support and a deeper foundation. Diameter and depths of the piers vary depending on the loads and geographical locations. Most builders piers I have run into on pier foundations are attached to the grade beam footing with rebar even though Engineers recommend to not attach the footing to the piers.
When built in areas with expansive clay soils void boxes are implemented under the footing to help allow the clay soils to swell without lifting the structure. Soil tests are done to determine the amount of swell in the clay soils called PVR ( Potential for Vertical Rise). In Irving TX there are areas that have as much as 13 inches of swell in the soil.The problems with repairing a pier and beam that foundation companies run into are usually with older structures with brittle concrete footings. If a repair is done with push piers using the weight of the structure the grade beam will not be able to take the stress required to install the piling without damaging the footing. Concrete pressed pilings are problematic when installing because pier and beams are light structures and proper depth is hard to achieve. I have run into the same problem installing steel piers either the structure is to light or the beam gets damaged from the flex of the beam during the driving process.