At Allied Bolt & Screw, we’re proud to supply domestic structural hardware designed to deliver strength, safety, and reliability where it matters most. Among the most trusted reinforcements in masonry construction are “Earthquake” Retaining Stars and Pattress Plates—classic hardware solutions that have stood the test of time, from historic preservation to modern structural reinforcement.
What Are Retaining Stars and Pattress Plates?
Structural stars (often called “earthquake stars” or retaining stars) and pattress plates are large, decorative washers used on masonry walls. Attached to tie rods running through a building, they distribute loads across the wall surface, helping to prevent bowing or separation while adding a timeless architectural aesthetic.
Why They’re Known as “Earthquake” Stars
The nickname comes from their role in reinforcing unreinforced masonry against dynamic forces. During seismic activity or ground movement, walls can crack, lean, or fail. By anchoring structural tie rods and spreading stress, retaining stars and pattress plates improve stability. Even outside seismic zones, they help control age-related wall bulging and movement caused by moisture or heavy loads.
Domestic Quality You Can Trust
- Made in the USA: Reliable manufacturing and consistent quality.
- Durable Materials: Robust steel construction for long-term performance.
- Options: Star, round, and square plates in multiple sizes and finishes to meet structural and design requirements.
Choosing domestic hardware helps with code compliance and delivers confidence that critical components are built to perform.
How the System Works
A tie rod or through-bolt runs across the structure and terminates at the exterior wall with a retaining star or pattress plate. The plate acts as a large bearing surface, clamping the wall and distributing forces to reduce localized stress.
- Compatible with threaded rods, nuts, and heavy-duty washers.
- Commonly used with brick, stone, and other masonry construction.
- Plates can be selected to balance engineering needs with visual style.
Typical Applications
- Historic Preservation: Reinforcing vintage brick or stone buildings while preserving their character.
- Commercial Buildings: Adding strength for warehouses, factories, and retail structures.
- Residential: Stabilizing older homes with masonry walls.
- Seismic Zones: Enhancing resilience in earthquake-prone regions.
Selection & Installation Notes
- Confirm plate size, thickness, and finish based on structural requirements and aesthetics.
- Use appropriate tie rod diameter and grade for the span and loads involved.
- Always consult a licensed structural engineer and follow local building codes.
Why Choose Allied Bolt & Screw
With decades of experience supplying structural fastening solutions, Allied Bolt & Screw is your trusted source for domestic retaining stars and pattress plates. We provide product guidance, reliable lead times, and the quality your projects demand.
Ready to reinforce with confidence? BUY NOW or Contact Allied Bolt & Screw to discuss sizes, finishes, and availability for your next project.
