Technical Specifications Leadwood Screw Anchors
Purchase Leadwood Screw Anchors
There are numerous technical specifications that must be considered when using Leadwood Screw Anchors including diameter, length, sheet metal screw diameter and required hole size. The longer length leadwood screw anchors are ideal when working with soft masonry. The size refers to the diameter of the sheet metal screw used to expand this anchor. Once all of these factors have been determined, you can find the expected holding values in the technical information below.
Screw Length:
To determine the length of screw required, simply add the thickness of the fixture to be fastened to the length of the Leadwood Screw Anchor.
Spacing:
The forces on a leadwood screw anchor are transferred to the material in which it is installed. If the anchors are installed too close together, it can cause an interaction of the forces, thus reducing the holding power of the anchor. As a rule of thumb, the expansion anchor industry has established a minimum standard of ten (10) anchor diameters for spacing between anchors and five (5) anchor diameters from an unsupported edge. When vibration or sudden impact is part of the load conditions, the spacing should be increased.
Technical Information: Ultimate Load Values in 2000 PSI Concrete
| Size | Minimum Embedment | Drill Bit | Screw Size | Pull-Out (lbs.) |
| 6-8 x 3/4” | 3/4” | 1/4” | 1/8” - 3/16” | 137 |
| 6-8 x 1” | 1” | 1/4” | 1/8” - 3/16” | 137 |
| 6-8 x 1-1/2” | 1-1/2” | 1/4” | 1/8” - 3/16” | 137 |
| 10-14 x 3/4” | 3/4” | 5/16” | 3/16” - 1/4” | 232 |
| 10-14 x 1” | 1” | 5/16” | 3/16” - 1/4” | 232 |
| 10-14 x 1-1/2” | 1-1/2” | 5/16” | 3/16” - 1/4” | 232 |
| 16-18 x 1” | 1” | 3/8” | 5/16” | 311 |
| 16-18 x 1-1/2 | 1-1/2” | 3/8” | 5/16” | 311 |
Values shown are average ultimate values and are offered only as a guide and are not guaranteed. A safety factor of 4:1 or 25% is generally accepted as a safe working load. Reference should be made to applicable codes for the specific working ratio.