I. TECHNICAL SKETCHUsed during the development of ideas for initial or primary plans.Quick and accurate sketches to convey design ideas to others.
TECHNICAL SKETCHSketch is a free drawing(IT IS NOT ALWAYS) Sketch on graph paper to take advantage of the lined squares Sketch on plain paper with/without the aid of drawing instruments.
TECHNICAL SKETCHDrawn without mechanical aid like t- scales, set -squares, compassBut drawn to scale and contain a variety of line weights and line styles.Grid paper becomes the guide helping to keep the lines straight.
MECHANICAL DRAUGHTINGRefined style of drawing guided by t- scales, set –squares, compass and French curves.Developed only after the conceptual stage is completed and design is finalized.
MECHANICAL DRAUGHTING• Consists of exterior/interior plans, elevations, sections, architectural features, detailed structural elements, electrical and mechanical systems, furnishings.
COMPUTER DRAUGHTINGDrafted documents prepared on a computer are called as CAD.Quick drafting and alterations.
COMPUTER DRAUGHTINGSpeed of revisionsReprinting, easily stored electronicallyShipped to other designers for revisions
A technical sketch gives an idea that the design is still being developed while a mechanically drafted or CADimplies an advanced state of planning and gives the impression the design has been finalized.
TYPES OF PAPERGRAPH SHEET-used as the base,for planning, drawing, rough designsketching, technical sketches.BUTTER SHEET-sketching anddeveloping ideas, initial andpreliminary layouts, space planning.GATEWAY SHEET- Reproductions,pukka draughting /drawing
CHART DIMENSIONSStandard paper sizes used by printers:• A0- 841 x 1189mm• A1- 594 x 841mm• A2- 420 x 594mm• A3- 297 x 420mm• A4- 210 x 297mm
LINE WEIGHTLine weight is the light or darkness and width of a line.Typically three kinds of LW-light, medium, bold.Guidelines-page layout Borderlines-framing the pageBest way to create consistent line weight and line quality is to keep the pencil/pen perpendicular to the drawing surface.
LINES AND LINE QUALITYGUIDELINES 4H to 6H pencil Very light, almost invisible Used to layout the page, create the initial shapes and provide guide for lettering heights.
BOLD LINES Soft B to 2B pencil(0.7mm) Very dark and thick width Used for walls in floor plans, outline around the perimeter of elevation and 3d objects.
MEDIUM LINES HB pencil(0.5mm) Used for furniture drawings in floor plans, text inside the objects in elevation and 3D views
LIGHT LINES H to 2H pencil(0.3mm) Used for action lines(door swings in plan view, hinge direction in elevation) information lines(dimension line, center line, section lines etc.) fill patterns(specific symbols for materials)
BORDER LINES 2B to 4B pencil(0.7-0.9mm) Dark and twice as thick as bold lines Used for margin on sheet, title border information lines(dimension line, center line, section lines etc.) fill patterns(specific symbols for materials)BORDER LINES SHOULD BE THE LASTLINE DRAWN ON SHEET
LINE TYPESSOLID LINE to indicate visible objects, leader lines and dimension linesDASHED LINE used for hidden objects(hidden parts objects below or behind an object)These lines should be in contact at corners and when perpendicular to another line.
LEADER LINE used to connect notes, references to objects or lines in a drawing start in a solid line and ends with an arrow can be drawn at an angle or curvedBREAK LINES Used when extents of a drawing cannot fit on the paper
CENTER LINE used to indicate center of a plan, object, circle, etc.If two center lines intersect use short dashes at the intersection.
SECTION LINEUsed to show a cutaway view ofa floor planThe direction of the arrows shows the direction of the section view