Rod Tie Down Plate – GLT

The Rod Tie Down Plate is an alternative tie-down method for locations requiring M12 threaded rods, such as GLT lintels or ring beams, as specified in Table 9.20 of AS1684.2 and AS1684.3.

It is challenging and error-prone to drill a vertical hole through a deep ring beam which can exceed 400mm in depth. Misaligned threaded rods sometimes come out from the side of the beam instead of the bottom, making tie-down connections ineffective. Replacing or repairing damaged beams incurs costs and delays. The Rod Tie Down Plate - GLT eliminates the need for deep drilling by using screws, addressing this on-site challenge.

The Rod Tie Down Plate - GLT satisfies NCC Performance Requirement P2.1.1 by adhering to the design rules in Australian standards AS1720.1, AS1684.2, AS1684.3, and AS1684.4. Extensive testing with GLT from various local suppliers confirms its tie-down capacity exceeds the requirements in Table 9.20 of AS1684.2 and AS1684.3 for M12 threaded rods.

• Minimum beam width: 65 mm.
• Minimum 250 mm end distance. 
• Design engineers must verify the timber beam’s capacity to achieve the required uplift strength.

Yes, Rod Tie Down Plate can be used singly to transfer the uplifting force to a beam.

6. Can I offset the Rod Tie Down Plates - GLT when used in pairs?

Yes, Rod Tie Down Plate - GLT can be used with offsets, as long as the timber beam is checked ok. The offset pair of Rod Tie Down Plates will create an additional bending moment on the timber beam, requiring structural engineer approval.

Yes, Rod Tie Down Plate - GLT can be used with offsets, as long as the timber beam is checked ok. The offset pair of Rod Tie Down Plates will create an additional bending moment on the timber beam, requiring structural engineer approval.

No, all screws in Rod Tie Down Plate series MUST be predrilled according to installation guide due to the close spacing on narrow beam edges.

The unthreaded section of the screw is 80 mm in length. This is critical to understand as it represents the maximum allowable thickness for all the material between the screw head and the edge of the ring beam. Here is an example of what is allowed: Rod Tie Down Plate (6 mm) + flooring (25 mm ply) + bottom plate (45 mm) = 76 mm. This is within 80 mm; therefore, it is acceptable.

The threaded section of the screw is 70 mm in length.

No, the threaded section of the screw must be fully embedded in the GLT beam only. This ensures that the flooring and the top and bottom plates are not affected by the uplifting force and that their structural integrity is maintained.

There is no limit to the maximum depth of a GLT beam that can support the Rod Tie Down Plate - GLT.

For the minimum depth:

• If the Rod Tie Down Plates - GLT are offset (beam moment capacity must be verified), the minimum beam depth is 150 mm, but this depth may be reduced when coupled with the flooring and the top and bottom plates.
• If the Rod Tie Down Plates - GLT are aligned, the screw length of 150 mm requires a minimum beam depth of 300 mm, but this depth may be reduced when coupled with the flooring and the top and bottom plates.

No. Only Multinail Advance Panhead screws provided in the kit are certified for use. Using alternative screws will invalidate the certification.

They are supplied in kit boxes containing all necessary components. The detailed kit contents are listed in the product brochure.

No. Rod Tie Down Plate - GLT can only be used with GLT beams. There is a Rod Tie Down Plate - LVL available for LVL beams with modifications to the brackets and the kits. Other engineered wood products are not supported.