Simpson Strong-Tie has launched two foundation plates that provide strength, giving installers spacing flexibility when attaching first-floor framing to the foundation.
The URFP and FRFP foundation plates are designed for locations with limited vertical clearance, in basement areas or crawl spaces, where floors are supported directly on the mudsill or a short cripple wall.
The URFP, a version of the UFP plate, serves as a one-for-one replacement for ½-inch or 5/8-inch diameter mudsill anchor bolts. The URFP fits a variety of foundation types and mudsill offsets and insets, ranging from 2½-inches to ½-inch.
The FRFP is the replacement for the FAP. The design offers higher loads and is ideal where the mudsill is flush to the inside of the foundation (or up to 1½-inch set back). In addition to the three prescriptive sill plate fastener holes, there are now two optional fastener holes which, when filled, provide increased loads and more spacing options. With all five holes filled, the FRFP is a one-for-one replacement for 5/8-inch anchor bolts.
In recent years, FEMA, regulating bodies (like the ICC) and even local jurisdictions have increased awareness of the need for seismic retrofit construction to improve the safety of older homes and buildings in areas vulnerable to seismic activity. Seismic retrofits help bring older homes closer to the current building codes in earthquake-prone regions.
For more information about the URFP and FRFP retrofit foundation plates, visit here.
2 Comments
Hello Larry,
Thank you for posting your question about installing foundation plates on https://retrofitmagazine.com/redesigned-foundation-plates-provide-seismic-retrofit-solutions/. Our recommendation is to have a continuous load path between the framing of the house and the foundation. Therefore, if the interior foundation walls are not connected to the framing of the house, then it is recommended that the interior framing be anchored to the interior foundation walls. For additional guidance on this topic, please refer to our Seismic Retrofit Guide available on our website. Please note that this document is in the process of being updated, therefore, does not show the latest product offerings. Please visit https://www.strongtie.com/foundationanchors_concreteconnectorsandanchors/urfp-frfp_productgroup_wcc/p/urfp.frfp for additional information on retrofit foundation plates. Please let me know if you have any additional questions.
Regards,
Jhalak Vasavada, MS PE | R&D Engineer | Simpson Strong-Tie
Are plates installed only on the out side walls of the house or do the inner walls need to be anchored as well? I have two inner foundation walls that run parallel for the length of my house.