Sign & Digital Graphics

July '17

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S I G N & D I G I T A L G R A P H I C S • July 2017 • 31 lated wires inside a conduit. The location of a power supply may vary depending on a sign job. If the sign is large enough, a power supply will be contained inside the sign. Sometimes a metal enclosure or hidden raceway is placed and installed behind a building fascia or wall. Wall penetrations are required for insulated wires connecting a power source to a sign and are usually contained within a device called a conduit, either metal or flexible plastic. With identifying the main com- ponents for an attachment detail, this is as basic as it gets. (Note to reader: This article is an example based on an electric sign that is commonly sold and installed in Long Beach, California. Figure 3 is an example for one set of chan- nel letters to be flush-mounted to a building fascia.) Figure 3 shows a replacement dia- gram of the previous abstract diagram and shows how an actual attachment drawing detail may form. Call-outs are written with identifying lines. A section view shows actual electri- cal components inside a Sign. (Note to reader: A majority of front-lit channel letters will only have one of two lighting types: LED lighting modules or neon glass tubes.) Remember, fluorescent lamps will not fit inside a channel letter, unless they are very large channel letters. A 5' set of Home Depot channel letters would possibly fit fluorescent lamps. Because not everyone understands drafting, a 3 D exploded view is shown in Figure 4 to provide more clarity. Note: A designer should know, a 3D exploded view is not required with a sign submittal. A designer must train themselves to envision a well-designed sign and how it will attach to a surface. Remember, a sectional view drawing with an attachment detail is only a cutaway side view of a sign. A general rule for drawing a build- ing surface is to draw it as an abstract image first, then add detail if required. If your sign project requires showing an actual brick wall, an EFIS wall, or a pre- fabricated concrete wall, by all means, Call-out Component Surface Component Return is Alum. Existing Bldg. Fascia Letter Face is Acrylic GTO Wiring & Boot Trim Cap is Plastic Glass Stands Lighting Device is Neon Glass Tube Anchors are Metal Expansion Anchors 1/4" dia. Drain Holes Sign Component Figure D Electrical Component LISTED Figure 3 Figure E Letter Face w/ Trim Cap Letter Return w/ Back Letter Return w/ Back Fastened to Surface Figure 4 show it. A quick search with Google will provide basic section views of several wall types. These wall images should give you a good idea of how to draw the sectional view for a wall surface for an attachment detail. Remember, most attachment details for a sign project will not require the intricate parts of a wall (i.e., studs, plywood, building paper, insulation, etc.). A sectional view with a basic surface depicting a wall with a call-out describ- ing the wall type will do (see Figure 5). In the beginning, learning to properly draw an attachment detail may be a little time-consuming. However, once you get the basics down, you will become faster the more you draw. Finally, as a technical sign designer, you should consider mak- ing it a point to draw faster. It's good for your resume. Brick Wall EIFS Wall Figure F Brick Wall Pre-Fab EIFS Wall Figure F Brick Wall Pre-Fab Concrete EIFS Wall Figure F Brick Wall EIFS Wall Pre-Fab Concrete Figure 5

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