Key Design Points for Single-Curved GRC Panel Roof Drainage | Qinglong GRC Roof Drainage Technical Specification

Drainage design for single-curved GRC panel roofs requires a minimum drainage slope of ≥3%, an eave overhang of ≥300mm, and a joint sealing grade of ≥7. The drainage system follows the principle of "clear primary and secondary routing, rational zoning, and timely water discharge," with single-slope length ≤15m, drainage outlet spacing ≤6m, and rainwater flow designed for a 50-year return period. Through curved surface optimization, localized water pooling is avoided to ensure smooth drainage.

Technical parameters: joint water pressure resistance ≥0.3MPa, drainage outlet discharge capacity ≥5L/s, roof rainwater runoff coefficient 0.9-0.95. A stadium roof featuring precision curved surface design showed no water accumulation during rainstorms, achieving a drainage efficiency of 98%. Qinglong GRC's professional drainage design ensures full roof functionality.

Curved Surface Drainage Optimization

Gaussian curvature analysis to avoid concave areas; flow guide channel design to direct water flow; intensified local slope inspections to ensure ≥2%; smooth curved surface transitions to reduce resistance.

Joint Waterproofing Design

Joint width of 15-20mm to accommodate thermal deformation; sealant movement capability ≥25% with durability ≥20 years; backer rods to control the shape factor; drainage cavities to promptly remove seepage.

Drainage System Calculation

Localized correction of rainstorm intensity formulas; accurate calculation of curved surface catchment areas; optimized drainage paths with fewer bends; safety factor ≥1.5 with adequate margin.

Detail Construction Treatment

Eave drip edges with ≥20mm projection; gutter slope ≥0.5% with sufficient capacity; concealed downpipe design that is both aesthetic and practical; anti-clogging measures for easy cleaning.

Drainage design is vital to functionality. Qinglong GRC's professional solutions ensure your roof remains completely worry-free.