| 摘要 |
Self supporting roofing plate for pitched roofs having purlinless roofing construction is disclosed. The roofing plate has a principal upright wall on its rear portion and is characterized by further having means for resisting increase in a predetermined bending angle existing between the principal upright wall and a top wall of the plate. The means are; (1) a second upright wall extending non-interruptedly adjacent the principal upright wall thus forming double upright walls with a gap in between along the entire longitudinal dimension of the plate and with the top wall from above the gap; (2) integral mini ribs located at the boundary region between the top wall of the plate and the principal upright wall, acting as struts connecting between mid portions of the principal upright wall and corresponding mid portions of the top wall; (3) integral mini ribs located at the boundary region between the principal upright wall and between a horizontal flange bent from its lower end, acting as struts connecting between mid portions of the principal upright wall and corresponding mid portions of the flange; or at least one or two thereof. This particular roofing plate allows for the rafters of the purlinless construction to be spaced apart up to as twice as allowed when using best known prior art products, thus significantly reduces costs and labor of the complete roofing construction. A roofing method is also disclosed, using said roofing plate, and also disclosed a supporter for use in the method. |
