Simpson Strong Tie FPBS44 Fence Post Base Spike

Product Description

The SIMPSON STRONG TIE FPBS44 is a heavy-duty steel fence post base spike engineered to anchor 4-inch x 4-inch posts securely into the ground. With an overall length of 34-7/8 inches, the spike drives deep enough to maintain stability across a range of soil conditions. It is used primarily for mailbox posts, fence posts, and similar light structural applications where a driven ground anchor is preferred over a poured concrete footing. Licensed contractors and experienced DIYers install this type of hardware to reduce concrete work while still achieving a firm, weather-resistant post base. Note that a pounding block is not included and must be sourced separately for installation.

The FPBS44 is suited for residential outdoor applications including mailbox post installations, fence lines, and garden structures that use standard 4-inch x 4-inch lumber. The spike design allows for direct installation into firm soil or compacted ground without the need for digging or concrete in most conditions. It is sold in packages of 4 units, making it practical for fence runs or multi-post projects requiring consistent hardware throughout.

Key Features

• Heavy-duty steel construction for long-term outdoor durability
• 34-7/8 inch overall length provides deep ground penetration and post stability
• Designed to accept standard 4-inch x 4-inch posts
• Driven installation eliminates the need for concrete footings in most applications
• Sold in packages of 4 units for multi-post projects

Compatibility

Designed as an OEM-style ground anchor for residential post installations using standard 4-inch x 4-inch dimensional lumber, including mailbox posts and fence posts.

Installation Notes

Install using a steel pounding block or driving cap placed over the spike head to prevent deformation during driving — do not strike the spike directly with a sledgehammer. Confirm soil conditions before driving; rocky or heavily compacted soils may require pre-drilling a pilot hole. Follow all local building codes regarding post anchoring and setback requirements. Inspect the spike for plumb alignment before driving to full depth, as repositioning after full installation is difficult.

Technical Specifications

• Material: Steel
• Overall Length: 34-7/8 inches
• Compatible Post Size: 4 inches x 4 inches
• Package Quantity: 4 per package
• Weight: 28 pounds
• Unit of Measure: EA

Standard Information

• Brand: SIMPSON STRONG TIE
• Manufacturer Part Number: FPBS44