屋面板(JWB)长度mm厚度mm荷载N/m275100125150175200***大长度8002000300035004200480052001000200030003500420048005200120019602920340040804640520014001920284033003960448052001600188027603200384043204950180018402680310037204160490020001800260030003600400048002200-----25002850335037504700)