Commercial and institutional locksmiths will find themselves working on construction sites. Whether they are working for a construction company or owner, they may be furnishing or installing hardware specified by a set of plans. Construction documents are also referred to as building...
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Another useful detail is in Figure 7. These elevations note the height in which the locking hardware is mounted from the finished floor.
If there is a discrepancy where a measurement seems wrong, a ruler can be used to verify the details as everything is drawn to scale.
As plans are photographed, scanned, or plotted, the overall drawings might be scaled down.
Actual scales are drawn onto plans for this purpose. In the case of a reduced or expanded copy, the scale can be measured and a ratio can determine the intended measurement.
For example, a scale was drawn indicating that 3 inches equals a foot. The scale should be exactly 3 inches long. If the scale is measure and it is 2.5 inches long, a ratio can be made so that measurements come out right. The left side of the ratio would always be 2.5 divided by 3.
A line that is measured as 2 inches on the drawing is drawn to the same scale. The right side of the ratio would be 2 divided by X.
The ratio equation would be 2.5÷3 = 2÷x
The solve for X is: 2.4
Since each inch equals 4 inches (the scale is 3” equals a foot), then 2.4 inches would equal 9.6 inches.
Working with floor plans and elevations
In Figure 8, on the partial floor plan, the door “400a” is highlighted.
Here it is easy to see why a wall bumper was specified in Set 100. For the first time, the handing of the door can be determined. When standing outside of the room, the hinges are on the left side so the door is “left-handed.” Because the door opens inward the bevel is standard.
Note that each door on the floor plan has an opening number.
The term seems awkward but it is more accurate than if we use “door number.” If an opening accommodated either a set of double doors or a set of double doors that swung in different directions and had a mullion between them, then it would be hard to designate the doors with one number. The opening number is easier to apply.
Floor plans offer vertical views (looking down) and elevations offer horizontal views (looking across).
Manage projects through effective site surveying.
For professional installations, planning and documenting is essential.
Door servicing and replacement provides an opportunity to expand your business.