The Simpson 38-1/2 in. Heavy Purlin Anchor - Galvanized HPA35 is a heavy-duty structural connector from Simpson engineered to fasten roof purlins securely to concrete or masonry walls. Built for demanding wood-to-concrete applications, this purlin anchor is designed to satisfy code requirements while keeping a low-profile footprint once installed - making it a dependable choice for contractors and builders who need reliable, code-compliant connections on structural roofing projects.

Key Features

• Embedment line stamped directly on the strap - gives installers a clear visual guide during concrete placement, reducing guesswork and helping ensure proper depth is achieved the first time.
• Nailing pattern optimized for the narrow face of nominal 3x or double 2x wood members - fasteners land exactly where they need to for maximum holding strength without splitting the lumber.
• Strap can be bent one full cycle during installation - allows the anchor to be adjusted 90 deg. vertically then bent back horizontal, giving crews the flexibility to handle real-world installation conditions without compromising rated performance.
• Designed to hook around rebar during concrete pour - the rebar engagement is integral to achieving the rated allowable loads, ensuring the connection performs as engineered once the concrete cures.
• Low design profile once installed - minimizes on-site visibility after construction, which matters on exposed or finished wall surfaces where aesthetics are a consideration.
• Zinc Galvanized finish, G90 coating - provides a corrosion-resistant barrier suited to the moisture exposure common in concrete and masonry wall applications.
• All fastener holes must be filled - the requirement to install every specified fastener ensures the connector delivers its full rated capacity, giving builders confidence in the completed connection.

Why This Product

• Built for code-compliant purlin-to-concrete connections - the HPA35 is specifically engineered to meet code requirements for connecting roof purlins to concrete walls, helping builders close inspections with confidence rather than searching for workaround solutions.
• Installation-friendly design that accommodates field conditions - the stamped embedment line, bendable strap, and rebar-hooking design work together to make proper installation achievable even when conditions in the field are not perfectly controlled.
• Sized for common structural lumber dimensions - the optimized nailing pattern for nominal 3x or double 2x members means this anchor integrates directly with widely used framing members, avoiding the need for adapter hardware or custom solutions.
• Made in the United States by Simpson - produced domestically by a recognized name in structural connectors, this anchor gives procurement teams and general contractors a product with a traceable, consistent manufacturing standard behind it.

Specifications

• Model No.: HPA35
• Gauge: 10
• Width (W): 2 1/16 in.
• Length (L): 38 1/2 in.
• Coating/Material: Zinc Galvanized, G90
• Country of Origin: United States

Approved Applications

• Connecting roof purlins to concrete walls
• Wood-to-concrete structural connections requiring code compliance
• Horizontal installation into the side of a concrete or masonry wall
• Applications requiring connections to nominal 3x or double 2x wood members

Frequently Asked Questions

Does the HPA35 purlin anchor need to hook around rebar during installation?

Yes. The purlin anchor must hook around rebar as part of proper installation to achieve the rated allowable loads.

What is the minimum concrete edge distance required for the HPA35?

The minimum concrete edge distance is 5 inches. For concrete-block installations, the minimum left-to-right edge distance is 20 inches.

Can the strap on the HPA35 be bent during installation?

Yes. The strap may be bent one full cycle - bent vertical 90 deg., then bent horizontal - to accommodate installation requirements.

Are all fastener holes on the HPA35 required to be filled during installation?

Yes. All specified fasteners must be used during installation. Note that some models may include extra fastener holes; refer to the specifications for guidance.