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Dimensioning Flooring Plans

A floor plan is advisedly dimensioned to ensure that items such as walls, columns, doors, windows, openings, stairs, and other particulars are correctly located for construction. Sometimes after a programme is drawn accurately to a scale, its reproduction causes a slight enlargement or reduction of the drawing. In such cases, the floor plan is slightly out of true scale, but this is acceptable because the written dimensions are the controlling factors. In fact, most designers add a note on the cartoon that says, "practice not scale drawing, follow written dimensions."

Generally, elements such as walls are dimensioned to the frame, equally the builder commencement erects this and and then adds the finishes to information technology. This dimensioning technique gives the exact location of the studs, columns, and beams and is more often than not placed to the face of these. In some cases, still, the centerline of the wall might be located and dimensioned.

A portion of a flooring plan tin be keyed with a symbol to a larger, more than detailed plan that is drawn elsewhere. For example, this part of the plan is referenced every bit expanse 6 and enlarged on canvass A4.

Dimensions on a floor plan generally locate the framework of the building, such equally the face of these 2x4 studs.

Dimensioning is done in a hierarchical style. Buildings, structural framework, rooms, and fixtures are dimensioned in decreasing size order. The bodily number of dimensions on a plan is dependent upon how much breadth the designer affords the contractor. A very detailed and dimensioned plan gives the builder fiddling room for difference from the original design. However, if only a few central dimensions are shown, the builder is trusted to decide exact locations of interior components. A proficient guideline for dimensioning falls somewhere between these two approaches. An overdimensioned plan allows the architect little freedom to brand field adjustments or substitute cost-saving techniques. However, too few dimensions can produce a lot of guesswork and increase the chances for error in the field and in coordination betwixt subcontractors.

All dimensions in this floor plan are to the face of a stud, except for the wall between the closets. It is dimensioned to the centerline of the wall. The cen-terline technique can also be used to locate exterior windows and doors, as seen in this case. Note that the dimensions on this partial floor programme are placed outside of the spaces. The extension lines do not bear upon the walls, and dark 45-degree tick marks indicate the extent of the dimensions.

Dimensioning Techniques

Dimensions are placed on the floor plan. Note that the dimension lines are drafted lighter than wall lines and are generally done every bit a continuous group or string of numbers along a line. The extension line begins slightly away from the object (a minimum of Vi6 inch or 1.58 mm), never touching information technology. It extends virtually V8 inch (3.17 mm) beyond the dimension line. Arrows, dots, or 45-degree tick marks (almost common) are used at the extension line and dimension line junction. The arrows, dots, or tick marks are fatigued with a thicker and/or darker line to make them stand up out graphically. The 45-caste tick marks are drawn in a consistent management. Yet, some draftspersons gradient the tick marks for vertically read dimensions from left to right and horizontally read dimensions from right to left. When using the computer, any of these three graphic symbols (arrows, dots, or ticks) can exist chosen up and consistently inserted for all dimensions.

Dimensioning on a floor program usually requires two or three continuous dimension lines to locate exterior walls, wall jogs, interior walls, windows, doors, and other elements. Outside walls of a building are dimensioned outside the floor plan. The outermost dimension line is the overall building dimension. The side by side dimension line, moving toward the programme, indicates wall locations and centerlines to doors and windows. Other miscellaneous details in the programme (such as minor offsets, jogs, or cabinetry and fixtures) are located on a third dimension line. This hierarchy of line piece of work allows the carpenters and other trades to quickly locate major framing elements and minor details by referring to the appropriate dimension line.

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Dimensioning on a flooring plan is grouped hierarchically, working from the overall dimension of the exterior walls to the smaller components of a building or space, such equally wall jogs, interior walls, windows, doors, and other of import elements. Nighttime tick marks at 45 degrees to a dimension's extension line are the almost mutual technique for indicating junction points.

A leader is used to signal the distance of i'-3J'ii" from a wall corner to the cheque-in shelf on this partial program, as the space within the dimension line is too small to letter of the alphabet in. Floor plans in small residential projects often depict material finishes, such as this tiled floor in the entry, kitchen, breakfast area, and utility room.

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Source: https://www.northernarchitecture.us/construction-drawings/dimensioning-floor-plans.html

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