The Rolling Offset Travel calculator computes the length of travel (T) or pipe to be cut based on the vertical (U) and horizontal (S) offsets and the angle of the elbow fitting.
Rolling Offset of pipes
INSTRUCTIONS: Choose the preferred units and enter the following information:
- (U) - Vertical offset
- (S) - Horizontal offset
- (fA) - Fitting angle. This is the angle of the elbow fitting on either side of the travel pipe. The most common fitting angles are 22.5°, 30°, 45°, 60°, 90°
Travel (T): The calculator returns the Travel (T) in inches. However, this can be automatically converted to other length units (e.g. centimeters) via the pull-down menu.
Related Calculators:
- To compute the Rolling Offset (run), (R) in the diagram, CLICK HERE.
General Information
When running pipes or conduit, it is common to have to change the run of the line of pipes by using two equal angled elbow fittings (see diagram). In this case, the amount of pipe needed between the fittings is called the travel, T in the diagram. The travel (T) can be calculated if one knows the vertical and horizontal offsets and the angle of the fitting.
Derivation
In the diagram above, the relationship between the travel length and the offsets is as follows:
` x = sqrt( U^2 + S^2)`
` T = x / cos (90 - fA)`
Note: vCalc allows for multiple units for both length (SI and English) and for angles (degrees and radians). The result will be in inches. However, this can automatically be converted to other length units (e.g. centimeters) with the pull-down menu.
Plumbing Calculators
- Rolling Offsets (Run and Travel) – The Rolling Offset
Rolling Offset Lengths 
Pipe Grading function computes the run and travel length a rolling offset based on the offsets and fittings. (see diagram). - Diagonal of a Square - This is a simple calculation to assist in computing the diagonal of a square.
- Diagonal of a Box - This computes the length of the diagonal of a box (T) based on sides of length R, S and U.
- Flow Rate - This computes flow rate based on the total volume and the time it took to accumulate.
- Pipe Flow Volume - This computes the total volume from a pipe based on the flow rated and the duration of flow.
- Weight of Water in a Tank - Computes the weight of water in a cylindrical tank based on the radius and height (or length).
- Weight of Water in a Pipe - Computes the weight of water or other substances in a pipe based on the dimension and material density.
- Weight of Sea Water in pipe - Computes the weight of sea water in a cylinder based on the radius and height (or length)
- Pressure Head - The Potential Gravity-Fed Water Pressure from a Tank (a.k.a. Pressure Head) based on the height of storage.
- Pipe Volume - Computes the volume in a pipe
- Pipe Surface Area - Computes the surface area of a pipe.
- Pipe Coating Amount - Computes the volume of coating material for a pipe such as paint, polyethylene, polyurethane, zinc, bitumen, FBE or mortar.
- Pipe Grading - Compute the drop needed over a run to maintain a grade (e.g., 4" over 12')
- Volume of Water in a Tank (e.g. hot water tanks),
- Volume of a Spherical Container
- Weight of Water in a Spherical Container
- Volume of Water in Rectangular Tank
- Weight of Water in a Rectangular Tank
- Capillary Rise - The height of water in a small tube due to capillary force.
- Snow Water Equivalence - The volume of water created by an area and depth of snow.
- Pore Water Pressure - Pressure of uplift from the water table.
- Pipe Stress Budget - Computes the pressure that a pipe can withstand based on the allowable stress, wall thickness and outside diameter.