... grade 13 3.Long service life: 60-70 years 4.Custom-made service 5.ISO9001,SGS,BV. Fast construction high quality ... materials are strictly selected, including doors, windows, tiles, ceiling, paint, water supply and drainage, electrical, toilet, cabinet, etc. 5 ... available. 6. Features & Advantages:1. Seismic resistance: grade 82. Wind load: grade 133. Fast & easy construction; no pollution4. Long life ...