The Simpson ECC78 End Column Cap is a heavy-duty structural connector from Simpson built to handle end-of-beam column-to-beam connections in wood construction. Engineered specifically for a 6-3/4 in. beam paired with an 8X post, this end column cap features a seat that extends beyond one side of the column, creating an expanded bearing surface that helps transfer load efficiently from beam to post. With its robust 3-gauge steel construction and Simpson gray paint finish, the ECC78 is well suited for structural connections subject to elevated uplift forces from seismic and wind events, and it meets NDS-compliant bolt spacing requirements for code-conscious builders and contractors.

Key Features

• 3-Gauge Steel Construction - Heavy material thickness delivers the structural integrity needed for demanding load conditions, giving builders confidence in long-term connection performance.
• Certified Welds - Factory-certified welds back the connector's rated strength and loading capacity, reducing uncertainty during inspection and installation sign-off.
• Extended Seat Design - The seat projects beyond one side of the column, increasing bearing surface area so load is distributed more evenly from beam to post rather than concentrating stress at a single point.
• Seismic and Wind Load Capacity - Enhanced uplift resistance makes the ECC78 appropriate for applications in high-wind and seismic zones where standard connectors may fall short of project requirements.
• Simpson Gray Paint Finish - The factory-applied finish provides a consistent, corrosion-resistant coating that holds up through the construction phase and beyond.
• NDS-Compliant Bolt Spacing - Designed to accommodate 3/4 in. machine bolts at code-compliant spacing, streamlining the permitting process and reducing the need for field modifications.
• Made in the United States - Domestic production supports consistent quality standards and reliable manufacturing tolerances for a precision-fit installation.

Why This Product

• Purpose-Built Fit for a Specific Beam and Post Size - The ECC78 is sized exactly for a 6-3/4 in. beam and an 8X post, eliminating the guesswork of adapting a general-purpose connector and ensuring a structurally sound, code-compliant fit from the start.
• Reliable Performance in High-Stress Conditions - With certified welds and a design rated for elevated uplift loads from earthquake and wind loading, this end column cap is a dependable choice for projects where connection failure carries serious consequences.
• Simplified Installation with Standard Hardware - The connector works with readily available 3/4 in. machine bolts and is designed around NDS bolt spacing, keeping installation straightforward without the need for specialty fasteners or custom drilling patterns.
• Flexible Configuration Options - Straps may be rotated 90 deg. and the connector can be adapted for special or rough-cut lumber sizes by specifying alternate dimensions, making it a practical solution across a wider range of real-world job site conditions.

Specifications

• Model Number: ECC78
• Description: 6-3/4" Beam, 8X Post End Column Cap
• Material: 3 gauge steel
• Finish: Simpson Strong-Tie gray paint
• Fasteners Required: 3/4" Machine Bolts - Beam (2), Post (2)
• Length: 10-1/2 in.
• Width 1: 6-7/8 in.
• Width 2: 7-1/2 in.
• Height 1: 8 in.
• Country of Origin: United States

Approved Applications

• End-of-beam column-to-beam connections in wood construction
• Structural connections requiring load distribution from beam to post
• Applications subject to elevated uplift loads due to earthquake or wind loading
• Wood construction projects requiring NDS-compliant bolt spacing
• End column installations utilizing 6-3/4" beams and 8X posts

What's Included

• 1 x Simpson Strong-Tie ECC78 End Column Cap
• Note: 3/4" Machine Bolts (2 for beam, 2 for post) are required for installation and are not included.

• Contact us for Configurable Options and Special orders
• Straps may be rotated 90 deg. (see SPECS)
• For special, custom or rough-cut lumber sizes, provide dimensions. An optional W2 dimension may be specified. (The W2 dimension on straps rotated 90 deg. is limited by the W1 dimension.)

Frequently Asked Questions

What beam and post sizes is the ECC78 compatible with?

The ECC78 is designed specifically for use with a 6-3/4" beam and an 8X post, making it important to confirm these dimensions match your project requirements before installation.

What makes the ECC78 suitable for seismic and wind load applications?

The ECC78 features enhanced uplift capacity specifically designed to address earthquake and wind loading requirements, along with certified welds that provide confidence in strength and loading performance throughout the life of the connection.

How does the extended bearing seat on the ECC78 benefit the connection?

The seat of the ECC78 extends beyond one side of the column, providing an expanded bearing surface area that helps distribute load efficiently from the beam while reinforcing the overall connection in end-of-beam applications.

What material and gauge steel is used in the construction of the ECC78?

The ECC78 is fabricated from 3-gauge steel and finished in Simpson Strong-Tie gray paint, providing heavy-duty construction built to perform under demanding structural conditions.