Roof Azimuth Definition

When used as a celestial coordinate the azimuth is the horizontal direction of a star or other astronomical object in the sky.

Roof azimuth definition. The vector from an observer to a point of interest is projected perpendicularly onto a reference plane. Solmetric focuses on developing quality solar site assesment tools that provide capabilities such as solar access shade measurements pv design and simulation software and pv performance verification and iv curve measurements. The horizontal angular distance from a reference direction usually the northern point of the horizon to the point where a vertical circle through a celestial body intersects the horizon usually measured clockwise. Definition the azimuth and tilt confirmation of solar panel is the one of important factors in the design of solar pv system.

If north is the reference point 0 then east has an azimuth of 90 south is 180 and so forth through 360. Walls are considered vertical surfaces. Enter the tilt of the roof. Steps for measuring roof azimuth.

A horizontal roof has an azimuth angle of 0 o and a tilt angle of 0 o. Azimuth is a horizontal angle measured clockwise in degrees from a reference direction usually the north or south point of the horizon to the point on the horizon intersected by the object s line of altitude a line from the observer s zenith through the object to the horizon. The tilt angle can be 61 to 90 degrees ashrae std90 windows are glass on walls and doors. If you are looking at a roof plan for your home or business very rarely will it list the roof pitch in degrees instead it lists the rise and the run of the roof.

Align the base of the compass with the edge of the roof. The roof azimuth angle is the azimuth angle of the equivalent wall. Knowing what direction a roof faces its azimuth is important to accurately estimate a roof mounted pv array s generation potential. For example a 7 12 roof pitch means that for ever 12 of horizontal distance the roof will increase in height by 7.

Set to flush mount to design a tilted residential roof. The roof azimuth tool is provided to you for free by solmetric. In terms of solar pv system the due south of azimuth is 0 it is minus angle from south to east to north it is positive angle from south to west to north. An azimuth is an angular measurement in a spherical coordinate system.

It specifies how many degrees the surface of the thermal collector or photovoltaic module deviates from the exact south facing direction the azimuth angle depends on the geographical location of the observer the date time and time zone. Most compasses will have an indicating arrow that will be perpendicular to the roof edge. They are assumed to have the same azimuth orientation angle as the wall it is located on. Use linear keepouts for ridgeline setbacks.

The star is the point of interest the reference plane is the local area around an observ. Sometimes the southern point is used as the reference direction and the measurement is made clockwise through 360. For example increase the tilt angle until it is vertical and it is the orientation looking out from inside. With the use of a compass and magnetic declination a roof s orientation can be determined using these few simple steps.

Right click the midpoint on the top or bottom edge of the roof to set automatically to align with the edge of the roof.