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Before using this calculator,
you must read and agree to our
End User License Agreement.

 

Missing Input

The Hip-End Pitch field is required.

 

Missing Input

The AHEP Spacing field is required.

 

Missing Input

The Truss Spacing field is required.

 

Missing Input

The Dead Load field is required.

 

Missing Input

The Live Load field is required.

 

Invalid Input

Hip-End Pitch must be a valid number. Do not include inch or foot markings.

 

Invalid Input

AHEP Spacing must be a valid number. Do not include inch or foot markings.

 

Invalid Input

Truss Spacing must be a valid number. Do not include inch or foot markings.

 

Invalid Input

Dead Load must be a valid number. Do not include inch or foot markings.

 

Invalid Input

Live Load must be a valid number. Do not include inch or foot markings.

 

Invalid Input

The Hip-End Pitch must be a non-negative number.

 

Invalid Input

The AHEP Spacing must be a non-negative number.

 

Invalid Input

The Truss Spacing must be a non-negative number.

 

Invalid Input

The Dead Load must exceed zero.

 

Invalid Input

The Live Load must exceed zero.

 
>>Home   > AHEP  |AHEP (CFS)

AHEP Design Calculator

The AHEP Design Calculator is a quick and easy tool to help wood or CFS truss Designers check AHEP applicability based on the actual hip-end roof pitch, input live and dead loads, truss and purlin spacing and the selected sheathing and deflection criteria. The calculator also checks minimum and maximum part lengths. Printable output is available for inclusion in the truss submittal package and job work orders.

AHEP Design

Roof Data

Load Data

  Calculation Results

AHEP Design Calculator

Total Down Load
This value is the calculated demand load that the AHEP is being asked to support based on your input span, spacing, live and dead loads. The dead load is calculated on the sloping length and the live load is calculated on the horizontal projection.

lbs

AHEP Allowable Load
This is the maximum load that the AHEP will support at your given span, spacing, sheathing, load and deflection criteria.

lbs

Length (L) that the AHEP needs to be extended to span between the trusses based on these input values.

AHEP Part Length
This is the length that the AHEP needs to be extended to and affixed with four (4) #10 self-drilling tapping screws.

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General Notes to the Designer:

  1. The AHEP is designed to perform as a structural purlin between 3/12 and 9/12 pitches.
  2. The AHEP can be utilized as an installation lateral restraint and spacing aid from 3/12 to 12/12.
  3. The AHEP part length (L) is from leading edge to leading edge of the framing members.
  4. Minimum AHEP Lengths: At 3/12 pitch the AHEP minimum length is 21". At 4/12 and higher pitches the minimum length is 19 3/4". Straight line interpolation is allowed between 3/12 and 4/12 pitch.
  5. Maximum AHEP Length: 30" when used as a structural purlin and 34" when used as an installation restraint and spacing aid only.
  6. The calculator is doing straight line interpolation of Simpson Strong-Tie's published design values for the AHEP.
  7. Demand loads are based on the tributary area determined from input values with the live loads calculated on the horizontal projection and dead loads on the actual sloping length.

General Notes to the Installer:

Product performance is dependent on proper installation described as follows:

  1. Prior to installation, the AHEP must be set to the proper length and the two tubes fastened together with four #10x3/4" self-drilling screws through the round holes in the side flanges for pitches between 3/12 and 9/12; and in the triangular and upper round hole when the AHEP will be used as an installation restraint and spacer at pitches >9/12 up to 12/12.
  2. For trusses spaced 24" o.c., the pitch markings on the inner tube may be used to line up the tubes to the correct length for a given pitch.
  3. For other spacings, the length (L) of the AHEP must be set to the calculated sloping length (from leading edge to leading edge of the framing members).
  4. To install the AHEPs on wood trusses, use four (4) 10d (.148"x3") nails. The two nails at the bottom of the part (the yoke end) must be clinched.
  5. To install the AHEPs on CFS trusses, use four (4) #10x3/4" self drilling screws.
  6. Sheathing is attached to the AHEP with knurled pneumatic fasteners or low-profile-head, self-drilling screws.
  7. Refer to the current Wood Construction Connectors Catalog or Cold-Formed Steel Connectors Catalog for additional information.

Input Data:


Calculation Results:

  1. The AHEP is designed to perform as a structural purlin between 3/12 and 9/12 pitches.
  2. The AHEP can be utilized as an installation lateral restraint and spacing aid from 3/12 to 12/12.
  3. The AHEP part length (L) is from leading edge to leading edge of the framing members.
  4. Minimum AHEP Lengths: At 3/12 pitch the AHEP minimum length is 21". At 4/12 and higher pitches the minimum length is 19 3/4". Straight line interpolation is allowed between 3/12 and 4/12 pitch.
  5. Maximum AHEP Length: 30" when used as a structural purlin and 34" when used as an installation restraint and spacing aid only.
  6. The calculator is doing straight line interpolation of Simpson Strong-Tie's published design values for the AHEP.
  7. Demand loads are based on the tributary area determined from input values with the live loads calculated on the horizontal projection and dead loads on the actual sloping length.

Product performance is dependent on proper installation described as follows:

  1. Prior to installation, the AHEP must be set to the proper length and the two tubes fastened together with four #10x3/4" self-drilling screws through the round holes in the side flanges for pitches between 3/12 and 9/12; and in the triangular and upper round hole when the AHEP will be used as an installation restraint and spacer at pitches >9/12 up to 12/12.
  2. For trusses spaced 24" o.c., the pitch markings on the inner tube may be used to line up the tubes to the correct length for a given pitch.
  3. For other spacings, the length (L) of the AHEP must be set to the calculated sloping length (from leading edge to leading edge of the framing members).
  4. To install the AHEPs on wood trusses, use four (4) 10d (.148"x3") nails. The two nails at the bottom of the part (the yoke end) must be clinched.
  5. To install the AHEPs on CFS trusses, use four (4) #10x3/4" self drilling screws.
  6. Sheathing is attached to the AHEP with knurled pneumatic fasteners or low-profile-head, self-drilling screws.
  7. Refer to the current Wood Construction Connectors Catalog or Cold-Formed Steel Connectors Catalog for additional information.
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