Structural Engineering of Arched Truss

Project Info

Case:

Structural Engineering of Arched Truss
Structural Analysis

Challenges:

  • Bearing the high wind velocity (providing the necessary structural analysis).
  • The soil type of A-7-5 with a 48” frost depth was making the design sensitive.

Design Assumptions:

  • The design, material types, thickness, and dimensions have been provided to meet the wind velocity of 90mph and snow load of 40 PSF.
  • The foundation has been prepared and designed according to the A-7-5 soil type layer and Standard Setting AASHTO with frost depth of 48”.

Work done:

In the following link, you can find a report of structural analysis in PDF which has been provided following the client’s demand for designing and calculation for Structural Analysis and Engineering of an Arched Truss of his property.
The design has been also simulated by software and the report of structural analysis simulation follows in the link below:

Report of Structural Analysis 

Description

The client asked for engineering and structural analysis of an arched steel truss. Below is a render was done in Revit MEP that approximates the design he was looking for (the first picture).
The requirements for the truss is that they can be placed 8′ OC, sequentially, to form a freestanding structure of any length. In my design, I did not include any diagonal bracing and we would need to consult on an appropriate design for those elements.
Timber purlins would be mechanically fastened to the truss. Timber tongue & decking fixed perpendicular to the purlins (the second image). Metal roofing affixed to decking. The design load requirement is to be 50lb PSF snow, wind ASCE 7-05. There are no seismic requirements. He also needed the specifications for the concrete pier foundation, material schedule, hardware schedule and other relevant data.

Results:
The result of wind flow was dragging the structure vertically on one hand, and making a turbulence flow under the structure on the other hand which pushes up the structure and make it unstable.
According to the structural analysis, conclusions, and simulations of this report, the truss can fully bear the proposed situation of wind velocity and snow load, and it thoroughly met with the client’s expectations.
Encl.:

1. Solidworks document
2. Solidworks CFD report
3. Solidworks FEA report
4. Cutting List

Client:
Jeff Dardozzi
Date:
October 11, 2017
Location:
US
Category:
Mechanical Engineering, MEP