The Internet has many places to ask questions about anything imaginable and find past answers on almost everything.

## What is a free plan in architecture?

In architecture, a free plan is an open plan with non-load-bearing walls dividing interior space. In this structural system, the building structure is separate of the interior partitions.

## What are ordering principles?

These 6 ordering principles include axis, symmetry, hierarchy, datum, rhythm, repetition, and transformation. When experiencing forms and spaces in a building, you can be assured that at least one, if not all of these ordering principles were employed by the building designer.

## Is the well ordering principle an axiom?

In mathematics, the wellordering theorem, also known as Zermelo’s theorem, states that every set can be wellordered. … The wellordering theorem together with Zorn’s lemma are the most important mathematical statements that are equivalent to the axiom of choice (often called AC, see also Axiom of choice § Equivalents).

## What is a datum in design?

Datum: A datum is a form which ties together or anchors all other elements of the design. It can be a line, like a road with houses arranged along its length, a flat plane, or even a 3D space. Many buildings all share a plane which acts as a clear datum— it’s the ground on which they are built! Ordering Principles.

## What are the types of datum?

There are two main datums in the United States. Horizontal datums measure positions (latitude and longitude) on the surface of the Earth, while vertical datums are used to measure land elevations and water depths.

## How do I choose a datum?

Datums are important and care must be taken when selecting them. They must be easily identifiable on the part. When parts are symmetrical or have identical features that make identification of Datum Features difficult, the Datum Features should be physically identified.

## What is a datum line?

Noun. datum line (plural datum lines) (engineering) A line which serves as a reference or base for the measurement of other quantities.

## What is an example of a datum?

An example of a datum is the assumed altitude of a specific piece of land used as the basis in calculating the altitude of the top of a mountain on the land. A point, line, or surface used as a reference, as in surveying, mapping, or geology.

## How is chart datum calculated?

Chart Datum is the plane below which all depths are published on a navigational chart. It is also the plane to which all tidal heights are referred, so by adding the tidal height to the charted depth, the true depth of water is determined.

## How do you get a datum point?

Creating a datum point by projecting a point onto a face. Select a point on the model and an edge or datum axis on which to project the point. Abaqus/CAE creates the datum point where the edge or datum axis intersects a line that is normal to it and passing through the selected point, as shown in Figure 7.

## How do you read a RL plan?

The levels on the site plan are the numbers next to the crosses on the site plan. They look like this: The cross marks where the level was taken on the site with the equipment, and the number is the height. If you look at the site plan, on the bottom left of the corner of the site is the level 10.

## What is a datum level in construction?

On a construction project, a datum level is an arbitrary horizontal plane of reference from which all vertical dimensions are measured. It can show the vertical height difference between floor levels of a building as well as differences in levels between one part of the site and another.

## What is a RL in construction?

From Wikipedia, the free encyclopedia. Relative level in surveying refers to equating elevations of survey points with reference to a common assumed datum. It is a vertical distance between survey point and adopted datum plane.

## How do you calculate RL levels?

Once you have taken all the levels you want, you will need to calculate the actual height values, or reduced levels (RL) by subtracting each one from the instrument height (IH). This gives you the ‘real’ height of the ground at the base of the staff.

## What is the difference between RL and FFL?

I don’t see it that often but engineers and surveyors use R.L. for Relative Level or Reduced Level. … It is a measurement of height taken from some known datum. F.F.L is First Floor Level.

## What is RL height?

Reduced level (RL): this is the height or elevation above the point adopted as the site datum for the purpose of establishing levels. To establish the required depths for a drainage system you need to work from the datum point.

## What is SSL and FFL in construction?

Correct me if Iam wrong, FFL refers to the level at the top surface of floor finish. … SFL refers to the level at the top surface of the floor screeding or concrete topping. While SSL refers to the level at the top surface of the structural slab.

## What is FFL plan?

The floor plans will also have the finished floor levels (FFL) on them so the builder knows how high above natural ground (NGL) the house is to be.