Damage to solar glass rarely occurs during factory production or ocean transportation. Most common defects such as edge chipping, corner cracking and crate collapse are caused by non-standard unloading procedures and careless on-site handling. The 2.0mm and 3.2mm tempered solar glass widely used in the industry features excellent surface compression resistance and weather durability, yet the glass edges are structurally fragile and prone to damage. Even momentary operational errors during final unloading can lead to product scrapping and substantial economic losses. This guide summarizes standardized unloading procedures for solar glass containers, effectively eliminating hidden glass damage and potential on-site safety hazards.
Scope of Application: Standard procedures for container unloading, warehouse inspection and temporary storage of bulk tempered solar glass
1. Pre-inspection Before Opening Container Doors
Do not fully open container doors immediately after cargo arrival. Complete external inspection first before any unloading operation.
Check the overall container exterior for dents, water stains, structural deformation and other visible abnormalities.
Vessel shaking, sea wave impact during ocean shipping, and emergency braking during inland transportation may cause cargo displacement inside the container.
Slightly open one container door to observe internal cargo conditions, and confirm no loose or forward-tilting crates.
Fully open both doors only after verifying stable cargo placement to prevent container collapse, falling hazards and glass damage.
2. Forklift Selection and Load Capacity Standards
Fully loaded solar glass crates weigh several tons. Unloading operations prioritize stability over speed, and rushed or irregular handling is strictly prohibited.
Deploy forklifts with sufficient load safety margin. Avoid equipment that only meets the minimum load standard with no extra tolerance.
Never operate forklifts under full-load limit conditions. Working at maximum capacity greatly reduces stability during turning and traveling on uneven ground, easily causing cargo tilt or fall-off.
Maintain low speed, uniform movement and stable operation throughout crate exiting and factory transit.
3. Standard Fork Position and Lifting Methods
Insert forklift forks completely beneath the crate base to ensure even force bearing and full bottom support.
Incomplete fork insertion leads to unbalanced force and crate distortion. Even if wooden frames and steel straps remain intact, invisible micro-cracks may form inside the glass.
For large-size solar glass crates, keep horizontal and parallel lifting to avoid unilateral overloading and stress concentration that triggers glass breakage.
4. Speed Control for Anti-impact and Anti-vibration
Tempered solar glass delivers outstanding outdoor aging resistance and weather adaptability, but it is highly sensitive to instant impact and intense vibration, and cannot withstand sudden external force loads.
Avoid sharp acceleration, emergency braking and hard landing during the entire handling process.
Minor impacts rarely damage the glass surface but frequently cause edge chipping and corner cracks, which account for most glass defects.
Keep steady low-speed movement during container exiting and on-site transfer to reduce jolts and vibration.
5. Vertical Placement Requirement for All Crates
Solar glass packaging and transportation structures are professionally designed for vertical storage and vertical shipment to adapt to vertical force bearing conditions.
Excessive tilting or horizontal stacking changes the internal force distribution of crates, continuously squeezing fragile glass edges and causing latent damage.
Maintain the original vertical placement angle throughout door opening, forklift transfer and temporary storage without arbitrary adjustment.
6. On-site Inspection Before Delivery Sign-off
Warehouse staff must conduct comprehensive visual inspection before signing delivery documents, so as to identify transportation damage and clarify responsibilities between suppliers and buyers.
Key inspection items:
Broken, deformed or loose wooden supports
Loose, displaced or fractured steel straps
Water stains, damp marks and penetration traces on package surfaces
Extruded corners, collision damage and obvious impact marks
Take photos and videos immediately once any abnormality is found. Preserved evidence supports subsequent responsibility confirmation and after-sales claim procedures.
7. Standard Storage Requirements After Unloading
Place unloaded glass crates in designated storage areas with dry, clean, flat and solid ground.
Keep away from uneven ground and low-lying waterlogged areas. Long-term outdoor stacking in rainy and snowy weather is forbidden to prevent moisture and frost damage.
Stay clear of frequent forklift and heavy equipment passages to avoid secondary collision and sustained vibration damage.
Ensure firm bottom support for each crate to prevent latent deformation of packages and glass caused by long-term uneven stress.
8. Key Risk Analysis and Operation Principles
Virtually no glass damage during unloading results from major safety accidents. Almost all defects stem from trivial operational oversights:
Incomplete fork insertion and insufficient supporting force
Unsmooth start-stop operation and unstable movement
Slight scratching and collision during transit
Abnormal stress caused by uneven storage ground
Core Principle: Solar glass is engineered to withstand decades of outdoor exposure including wind, rain, high and low temperatures. However, it is most vulnerable during unloading and on-site storage. Strict standardized and refined unloading procedures effectively guarantee intact glass condition from factory delivery to production line and eliminate unnecessary losses.
9. Safety Operation Guidelines
All staff engaged in glass unloading and transfer must complete professional pre-job training and be fully familiar with standard operating procedures. Overtime rushed operation for higher efficiency is strictly prohibited. Steady and standardized handling is the core method to reduce glass damage rate, cut logistics loss and control production costs.
