1. Ballast-type Bracket

Advantages

No drilling required: Eliminates the need to drill holes in the roof surface, preventing damage to the waterproofing layer. Ideal for roofs with high waterproofing requirements (e.g., color-coated steel tiles, tile roofs).

Quick installation: Completed after transporting and positioning the counterweight blocks, minimizing on-site construction time.

Relatively low cost: Primarily composed of concrete or standard metal blocks, resulting in low manufacturing expenses.

Limitations

Weight Requirements: Demands specific roof load-bearing capacity; unsuitable for lightweight roofs (e.g., aged tile roofs).

Space Occupancy: Counterweight blocks occupy roof area; dense installations require careful planning.

Wind Resistance Limitations: In high-wind regions, counterweights alone may prove insufficient; supplementary anchoring or hybrid systems are necessary.

2. Drilled-anchor type Bracket

Advantages

High Load-Bearing Capacity: Directly transfers bracket loads to the roof structure, suitable for regions with high wind pressure and heavy snow loads.

Excellent Rigidity: High rigidity between the bracket and roof connection ensures minimal relative displacement and long-term stability.

Adjustability: On-site fine-tuning of bracket height and tilt angle is achievable by replacing bolt lengths or adding shims.

Limitations

Requires drilling: Poses a risk of damaging the roof waterproofing layer; proper waterproof sealing must be applied (e.g., waterproof sealant, silicone sealant).

High construction difficulty: Requires specialized tools and precise drilling positioning, resulting in relatively longer construction time.

Restrictions on roof materials: Not suitable for extensive drilling on thin tiles or aged roofs.

3. Hybrid type Bracket

Advantages

Balances strength and cost-effectiveness: Drilling is performed only at necessary locations, minimizing waterproofing disruption and construction costs while maintaining high structural integrity.

Flexible adaptation: The number of counterweights and anchor points can be adjusted based on roof load capacity, wind pressure ratings, and construction conditions.

Reduced self-weight: Compared to fully counterweighted solutions, fewer counterweights are required, alleviating roof load.

Limitations

Relatively complex design and construction, requiring structural analysis to determine optimal anchor point and ballast block layouts.

Drilling remains necessary at certain locations, necessitating continued attention to waterproofing treatment.