(1) Indicate the length of the span of the arch, which is the greatest horizontal distance between the supports of the curved roofing.
(2) Plan-view dimension representing the full length of the curved roof measured perpendicular to the arch span.
(3) Specify the obstructed area under the canopy, in square meters, as a proportion of the total area of the front or side (transverse or longitudinal) façade, in order to calculate the obstruction factor. If it is a closed construction or there is no obstruction area, indicate 0 m².