drafting rear elevations. start with outer frame when drafting standard flat. heights are generally...
TRANSCRIPT
DraftingRear
Elevations
• Start with outer frame when drafting standard flat.
• Heights are generally in multiples of 2’-0”.
Outer Frame
• Next add toggles and dimensions.
• Toggles should be every 4’-0” on center.
• Notice when dimensioning toggles add o.c. standing for on center.
• Dimension all pieces in flat so shop can create cut list.
Flat 1
• On taller flats there is a toggle every 4’-0”
• Note o.c. is used for every measurement.
Flat 2
• Put drafted detail of keystone and corner block on one drawing and then refer to this detail on all other flat plates for a show.
• Indicate that keystones and corner blocks are made from 1/4” plywood.
• Off set them 1” from the edge.
• Glue and fasten with staples or 3/4” coated nails.
• These details should be in a larger scale to show details clearly.
Detail 1
• A door flat follows the same principles as the standard flat.
• Toggles are placed every 4’-0” as needed. The top of the door flat acts as a toggle. (There isn’t four feet above the the top of the door. So there is no need for an additional toggle.
• Corner blocks are used on the corners that are part of the door opening.
Door Flat 1
• Sometimes it is necessary for an extra long keystone to do the work of two short keystones.
• This one long keystone is stronger then two short keystones put end to end.
Detail 2
• Window flats also follow standard flat construction techniques.
• The joints around the window opening often use keystones not corner blocks.
• Keystones are inset 1” to permit attachment of reveals if desired.
Window Flat
• A keystone may often have to cover more then one joint in a window or door flat. (See previous slide.)
• When using wide keystones diagonal grain is used so that all joints have maximum strength.
• Nailing patterns should be based on standard nailing patterns and joint arrangement.
• Make sure that all keystones and corner blocks are still offset from the edge 1”.
Detail 3
• Sometimes flats are built from materials other then 1x4 lumber.
• Here the small side of the door flat is made from a 1x6 “true” piece of lumber.
Door Flat 2
• Door openings can also be made by combining two standard flats and a small flat known as a plug.
• Plugs are usually “built to fit.”
• This technique is often used when a door is in a long wall and you are using stock flats and only building what is needed.
Flats & Plug Door
• Once you learn how to draft the individual units they can be put together into a drawing that tells the shop all of the information they need to know.
• If possible it is best to include a small floor plan to show how the flats are used.
• Walls the same size need only be drafted once.
• Walls are labeled on both the plan and rear elevation.
Rear Elevation