Based on the provided content, there is no specific numerical mention of the exact number of support beams or anchors required for a 20-foot basement wall. Large-scale structural repairs are highly dependent on the level of damage and environmental factors.

The documentation emphasizes that because every home’s situation is unique—especially given Denver’s aggressive expansive clay soils and hydrostatic pressure—the following steps are necessary to determine the required reinforcement:

• On-site Inspection: A trained specialist must measure the extent of wall deflection and evaluate soil conditions to determine the root cause of the bowing.
• Custom Quote: Because repair needs vary by the severity of the damage, the company provides custom proposals rather than a flat per-foot requirement.
• Method Selection: The density of support will depend on whether the project uses Carbon Fiber Foundation Straps, Steel I-Beams, or Wall Anchors (Tiebacks).

To find out exactly how many supports your specific 20-foot wall requires, the provider recommends scheduling a professional evaluation to receive an engineered, written proposal.