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`"Purlins" = "Metal for Shed (Roof and Walls)"`

Enter a value for all fields

The **Metal for a Shed or Run-in **calculator computes the total number and length of metal panels for the roof and walls based on the ridge length of the roof, the front and back heights, the width (span) of the building and the front and back overhangs.

**INSTRUCTIONS:** Choose units and enter the following:

- (
**L**) Length - (
**W**) Width - (
**FH**) Front Height - (
**BH**) Back Height - (
**oH**) Overhang - (
**oB**) Back Overhang

**Metal for Shed or Run-in (RP):** The calculator returns the number and length of metal panels for the roof, sides and back.

This is for an open-faced (three sided) shed or run-in (see picture). The metal panels for a Shed or Run-in calculator is meant to help with material estimates for a metal roof and siding. Metal roofs and side walls are often connected to purlins. **CLICK HERE** to estimated the purlins needed for a shed or run-in.

The length of the roof panels are equal to:

`RP = sqrt( (W+FH+BH)^2 + (FH-BH)^2)`

This calculator uses a standard panel width of 36" of coverage. Therefor the roof panels are RP long. The number of roof panels is the length (L) divided by 36" and rounded up.

The height of the side panels is the greater of Back Height and Front Height. And the number of side wall panels is the width (W) divided by 36" and rounded up, and then multiplied by 2 for the two sides. The height of the back panels is the back height. The number of back panels is the length (L) divided by 36" and rounded up.

When we built this run-in, we used 4x4 posts that were 12' long in the front and 10' long in the back. Several days before any framing, we dug the holes for the posts and made them as level (vertically and horizontally) as possible. We dug below the frost line (18" where we live), put down some loose gravel, and then encased the base of the posts in concrete. We let that stand for a few days to ensure that framing wouldn't move the vertical posts. Then we put the purlins on the back and sides. And then the diagonal boards This stiffened the frame an also gave us a nice set of boards (purlins) to act as ladders up to the beams and rafters. We then put in the beams, rafters and face plates. The last framing was the purlins on the roof. After that, we were able to quickly cut and place the metal panel on the roof (that's my beautiful daughter on the roof), and then the three sides.

The horse love it.

This run-in has been up for over a year now. The horses still love it and better yet, it keeps them healthy. We faced it east, so that they were able to get out of the driving westerly wind. We also placed it where it was a slight grade so that no water would be standing where the horses would loiter.

**In all cases**, confirm your estimates with a professional estimate and adhering to local building codes.

Pitch of a Roof - Computes angle of incline in the roof in both degrees and rise over 12" run (e.g. 26.6^{o} : 6/12) based on the length of the rise and run.

- Gabled Roof
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- Shed Roof
- Dormers

- Total Building Materials Calculator
- Pitch of a Roof - Computes angle of incline in the roof in both degrees and rise over 12" run (e.g. 26.6
^{o}: 6/12) based on the length of the rise and run. - Number of Trusses Needed for a Roof - number of trusses needed based on the roof width and the truss spacing.
- 4x8s needed for a roof - Calculates the number of 4x8 sheets needed to cover a roof.
- Roofing nails needed for a roof - Calculates the number of roofing nails needed for a roof in normal and high wind conditions.
- Number and Length of Metal Roof Panels - Computes the length and number of metal panels and trim pieces for a metal roof.
- Screws for a Metal Roof - Computes the number of screws needed for a metal roof.
- Number and Length of Purlins for a Roof - Computes the number of purlins for a roof based on dimensions and spacing.
- Number and Length of Rafters - Computes the number and length of rafter boards based on roof dimensions and spacing.
- Number and Length of Rafter and Collar ties - Computes the number and length of rafter ties and collar ties based on roof dimensions and spacing.
- Number and Length of wall top and bottom wall plates
- Number of Studs for a Room
- Number of Studs in a Wall
- Room Interior Area (wall and ceiling)
- Cubic Feet in a Room (volume)
- Number of 4x8 or 4x12 Sheets for a Room
- Number and Length of Floor Joists
- Number of Joist Hangers
- Compute the Cost of Floor Joists
- Compute iJoists for larger floors
- Compute the Number of 4x8 Sheets to cover the Deck or Floor
- Compute the number of Decking Boards to cover the deck or floor

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