Two or more sections are often cut at 90 degrees to one another to give additional information, unless the space or object is very simple. The slice should be taken where it will BEST illustrate the relationship between significant components of an object or interior space.
It is ideally cut in a continuous straight plane but may be cut in jogs. The location of this cut is indicated on the floor plan or elevation (whichever is the base drawing) with a graphical symbol. (This symbol gives the section an identification number with an arrow that shows the direction the person is looking when viewing the final section drawing.) The arrow on the building section symbol shows the direction of the view. The top number is the section number, and the bottom one indicates the sheet it is drawn on.
Ranges from 1/8” to 3” – depends on size of the drawing paper, building, component, desire features to be shown. Construction drawings ONLY show items or components of a space that are built-in or attached to the structure. Movable furniture is NOT shown in this type of drawing. Drafting Standards Section drawings are shown as cut through solid elements and space (voids) within an object or building.
Typical materials are shown in the text on figure 3-11 and include concrete and masonry, wood, metals, earth & stone, insulation, and miscellaneous such as glass, carpet and gyp board. To differentiate these materials from adjacent construction or objects seen beyond the line weight is differed. Building Sections These are used to show the construction details of single or multi-level structures including the floors, walls, and ceiling/roof. The location and nubr of building sections to be cut will depend on the clarity and amount of information to be shown about the structure and its features. Typically drawn at a scale of 1/8” or ¼.
Longitudinal Section: Cut through the length of a building Transverse Section: Cut 90 degrees from the longitudinal If a detail or other assembly (such as a wall) needs to be presented to convey more info, indicator marks are drawn on the building section for cross-reference to another location where this detail is drawn to a larger scale. Sections of Interior Spaces
Often resemble a building section I their composition but are more concerned with interior aspects of the assembly. Do not always show floor thickness and other structural details Small objects may be keyed with a symbol on a section drawing and enlarged elsewhere. Scale: 1/” or ¼” or even ½” as need for clarity Wall Sections This section is drawn at a large scale to show the specifics of an interior or exterior building wall.
Often keyed to main building section and permits designer to enlarge for detail More than one wall section is typically required Shows typically floor and ceiling systems Scale: ½” to 1-1/2” Desirable to draw wall section in entirety from bottom of the wall to the top. Break lines may be used to compress drawing to fit paper ID 312 Advanced Construction Documents Ch 10-11 Lecture Notes
Week 4 Lecture Notes: Ch 10-11
Detail and Object Sections
To fully explain a portion of an assembly
Example: handrails or objects such as cabinets and furniture Detailed section or part of it is drawn st a large scale to clearly show the items Scale minimum is ½” and can range to a drawing scaled to full size. Detailed
sections are cross-referenced to other drawings, indicating where the assembly is located within the whole.
Checklist for Section Drawings
Title the drawing and note its scale.
Key the drawing to other sections, plans, or related drawings. Pouché areas of the section that cut through a material, if the scale of the drawing permits Make sure materials rendered in section view are commonly recognized graphical symbols, or place a nearby note or key and lege3nd to their meaning. Use at least three graphical line weights to visually make the section clearly understandable as to materials sow in section, voids, and objects seen beyond the section cut. Check plan for code compliance and ADA requirements and clearances. Check plan for LEED certification (if applicable)
Note special materials, features, clearances, alignments, and other important items Call out room/space names or numbers that section refers to Cross-reference the section drawings, carefully checking for accuracy and completeness of information User manufactures’ templates or CAD images for drawing plumbing fixtures such as water closets and lavatories in the sections where they might show In building and interior sections, draw and note appliance/equipment such as refrigerators, dishwasher, washer/dryer, microwave, trash compactor, etc. If item is not to be supplied by contractor, add note that is to be N.I.C. (not in contract)
Specify or clearly show substitute construction materials.
Call out (with generic names) wall and cabinet base materials, mirror, wainscot, molding, chair rails, and shelves (adjustable or fixed). In
interior sections, call out generic wall finishes (vinyl, ceramic tile, brick, wood paneling, gypsum board, fabric, etc.), or cross-reference to the finish plans