Bolthold SP58-58 Asphalt Anchor – Zinc Plated
The Bolthold SP58-58 asphalt anchor is a heavy-duty anchoring solution designed specifically for high-demand asphalt applications. This 10″ asphalt anchor bolt is ideal for securing tents, speed bumps, curbs, and similar fixtures directly into asphalt surfaces. Each anchor is pre-installed with a bolt and washer and installs flush with the surface for a clean, low-profile finish.
Load anchors to no more than 80% of rated pull strength when the structure is self-supporting. If the structure applies a static pull force on the anchors, limit loading to 20% of the rated pull strength.
SP58-58 Asphalt Anchor – Heavy-Duty Flush Mount Asphalt Anchoring
Engineered for strength and removability, the SP58-58 anchor requires a 1.5″ diameter hole drilled 10″ deep and the use of compatible grout to achieve proper holding power. A large top header prevents pull-through during tightening while allowing mounted items to be removed cleanly without leaving surface protrusions.
Key Features
- Flush-Mount Design: Installs level with the asphalt surface for a clean, trip-free result.
- Large Top Header: 2″ header prevents anchors from dropping below the surface or pulling into the mounting plate.
- Pre-Assembled Hardware: Includes factory-installed bolt and washer for faster installation.
- Heavy-Duty Asphalt Anchor: Designed for high-load and surface-mounted asphalt applications.
Common Applications
- Tents and temporary structures
- Speed bumps and traffic calming devices
- Curbs and parking lot fixtures
- Event and site furnishings
- Removable asphalt-mounted installations
Installation Tips
- Drill a 1.5″ diameter hole to a depth of 10″ for proper anchor embedment.
- Ensure the thread length inside the anchor does not exceed 4″.
- Use approved grout and allow full cure time before applying load.
Required Grout:
Listed below are the approximate amounts of grout required to install one six-pack of SP58-58 asphalt anchors.
- Two six-packs of EPX2 grout. (12 oz. bags) – Each Bag Of EPX2 grout installs (0.5) SP58-58 Anchor.
- One EPX2 tub of grout. (10 lb. tub) – Each Tub Of EPX2 grout installs (10) SP58-58 Anchors.
- Six EPX3 cartridges of grout. (10 oz. tube) – Each Tube Of EPX3 grout installs (1) SP58-58 Anchor.








