Clear answer
Clear answer, explained.
A structural assessment determines whether the existing framing, decking, and connections can support these loads. If capacity is insufficient, reinforcement such as additional steel members, upgraded purlins, or load-spreading systems can be added before solar installation.
Key points
What this means in practice.
- Structural assessment is required for older roofs
- Reinforcement can increase allowable dead, wind, and snow loads
- Common upgrades include purlin strengthening and frame bracing
- Roof condition and remaining service life must be verified
- Reinforcement is often more cost-effective than roof replacement
- Structural engineer sign-off is typically required
When this applies
Best-fit environments.
- Industrial buildings with roofs older than 15–25 years
- Pre-engineered metal buildings and large-span warehouses
- Sites with limited original load capacity
- Projects subject to building code and permit review
Q·01
