The Simpson RETRO PLATE is a hot-dip galvanized steel retrofit plate engineered for exterior masonry wall connections, helping tie walls to roof or floor structures on existing masonry buildings. Built to meet IEBC prescriptive requirements for unreinforced masonry and multi-wythe solid brick walls, this plate delivers the structural reliability and corrosion resistance that exterior retrofit applications demand.

Key Features

• 6 in. x 5 3/4 in. plate size - satisfies the code-required minimum of 30 square inches of bearing area, keeping your masonry wall tie connections fully compliant without additional modifications
• 3/8 in. thick steel construction - provides the structural rigidity needed for demanding exterior masonry retrofit applications, including both unreinforced masonry and multi-wythe solid brick walls
• Hot-dip galvanized coating - delivers enhanced corrosion resistance for long-term durability in exposed exterior environments where moisture and weathering are constant concerns
• Accommodates multiple rod diameters - accepts a 3/4 in. diameter rod directly, and a 5/8 in. diameter rod with a standard-cut washer, giving designers flexibility to meet varying load demands
• Meets IEBC prescriptive requirements - pre-qualifies for compliant use on unreinforced masonry and multi-wythe solid brick wall connections, streamlining plan review and inspection
• Made in the United States by Simpson - backed by a trusted name in structural connectors, ensuring consistent quality and material traceability

Why This Product

• Code-ready for masonry retrofit work - compliance with IEBC prescriptive requirements for both unreinforced masonry and multi-wythe solid brick walls means less time spent on engineering justification and more confidence during inspections
• Built for the exposure of exterior masonry applications - the hot-dip galvanized finish is specifically suited for conditions where a wall tie plate faces ongoing weathering, reducing maintenance concerns over the life of the connection
• Flexible rod compatibility supports design freedom - the ability to use either a 3/4 in. or 5/8 in. diameter rod lets structural designers dial in the connection to match specific load requirements without sourcing a different plate
• Precise sizing that meets bearing area requirements - the 6 in. x 5 3/4 in. footprint is not arbitrary; it is sized to meet the 30 square inch minimum bearing area threshold, removing guesswork for contractors and engineers working on masonry wall-to-diaphragm connections

Specifications

• Model No.: RP6HDG
• Bolt Dia. (in.): 3/4
• Thickness: 3/8
• Width (in.): 6
• Length (in.): 5 3/4
• Coating/Material: Hot-Dip Galvanized
• Country of Origin: United States

Approved Applications

• Exterior installation on masonry buildings to tie walls to roof structure
• Exterior installation on masonry buildings to tie walls to floor structure
• Unreinforced masonry wall connections meeting IEBC prescriptive requirements
• Multi-wythe solid brick wall connections meeting IEBC prescriptive requirements

Frequently Asked Questions

What rod diameter should be used with the RP6HDG?

Use a 3/4"-diameter rod with the RP6HDG. A 5/8"-diameter rod requires an additional standard-cut washer under the nut.

Does the RP6HDG meet building code requirements?

Yes. The RP6HDG meets IEBC prescriptive requirements for both unreinforced masonry and multi-wythe solid brick walls.

Why does the RP6HDG have a 6" x 5-3/4" dimension?

The 6" x 5-3/4" size ensures the plate meets the code-required minimum of 30 square inches of bearing area for compliant masonry wall tie connections.

Why is the RP6HDG hot-dip galvanized?

The hot-dip galvanized coating provides enhanced corrosion resistance, making the RP6HDG well suited for exterior masonry applications where the plate is exposed to the elements.