Slicing through an object or building DRAWING SECTION VIEWS

A section view is a view used on a drawing to show an area or hidden part of an object by cutting away or removing some of that object. Otto Lilienthal, the creator of Ankersteinbaukasten. He founded the field of aeronautical engineering, piloted 2000 glider flights, ran his own factory, and was preoccupied with the care of his factory employees. Here is one of Lilienthal's illustrations, with some excellent contextualized cross-sections of bird wings - Beautiful Evidence by Edwarde Tufte

ENGINEERING SECTIONS

The cut line is called a “cutting plane” It is very important to Visualize what the part will look like after it is cut open. Choosing the type of section and location of the cutting plane. Making the cut and drawing the view in the proper location. Shematic drawings from a patent application by Gibson Guitar Co WHAT IS A CUT LINE?

FULL SECTION In a full section, the cutting plane line passes fully through the part. Normally a view is replaced with the full section view. The section-lined areas are those portions that have been in actual contact with the cutting-plane.

Replacing the View

The symbol for cast iron can be used for most section views. 45 degree angle lines should be used. 1/8” between lines. All lines should be uniformly spaced Thin sections may be blackened in completely Common Material Symbols & Line Spacing

LINE SPACING WITH DIFFERENT PARTS Assemblies with several parts should be lined with varying angle section lines.

Line Spacing Examples Lines should never be parallel or perpendicular to the object lines. If the outline of the object has 45 degree lines, 30 or 60 degree lines should be used.

ARCHITECTURAL SECTIONS

Section of a House

BUILDING SECTION emmaslatteryarchi5.blogspot.com Shows spaces inside and outside the building. Context for the surrounding spaces (trees, buildings) people (silhouettes) help visualize the space.

BUILDING SECTION- CAD Typical Scale: ¼” = 1’-0” ilovemyarchitect.com

WALL SECTIONS reachschoolrwanda.com Are a slice through a wall revealing its contents Shows Framing – beams & joists Footings and Foundations Floor & Ceiling Heights Roof Pitches Window and Door Frames Interior and Exterior Finishes Air Space Hatch patterns for different materials

SITE SECTION architectureassociate.blogspot.com

SITE SECTION- CAD dyami.com  Vertical cut through the context of the surrounding site  Includes other buildings, trees, water, or other landscape features to explain the nearby adjacencies.

RENZO PIANO’S SITE SECTION

DETAIL SECTION pixgood.com A Partial or Call-Out Section magnifies the scale of a small portion of a larger section in order to show more highly detailed information. These drawings typically range from 1" = 1' to full scale.

SECTION PERSPECTIVE weblogs.lib.uh.edu

SECTION PERSPECTIVE A section perspective is a composite drawing which combines a section through the building, room or detail, with the perspective view that would appear beyond that cut. Not used in actual construction documentation They are a valuable tool for presentation drawings and process and study work. Good at illustrating the project narrative (much like a rendering) More dynamic than a conventional section in conveying the relationship between spaces.

LINE WEIGHT & TYPE Line weight, or the visual lightness or darkness and width of a line, are conventionally used in section drawings as follows:Line weight –Elements which intersect the cut plane of the section are demarcated by the heaviest line weight, by a hatch or with poche. –The middle line weight is used to show physical objects that are shown in elevation beyond the cut. This may include wall edges, doors, windows, etc. –The lightest line weight represents material, finish or texture on physical objects in elevation. It can also be used to context or building elements that are far beyond the section cut. –Dashed lines in section represent objects that are not 'visible' in that cut, either lying behind the cut plane or obscured by other elements, but may be important to show. –Dashed lines at different spacing, or dotted lines can be used to show range of motion for operable components or to represent other non physical phenomena such as light throw from openings and fixtures or sight lines from various locations in the space. –Section drawings may contain several other line weights as well, depending on the depth you want to convey. Major cuts, through shear walls or other large built components may be in a dark poche, whereas cuts through smaller interior elements may be of a slightly lighter line weight or lighter poche.poche Notes on sections taken from

POCKET PARK SECTION Requirements: 1.Site Section –Includes other buildings, trees, water, or other landscape features to explain the nearby adjacencies. –Call Out a Detail Section of the foundation for your wall or pavilion 2.Detail Section

EXAMPLE- DETAIL SECTION OF RETAINING WALL

EXAMPLE- PARK SECTION