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# Roof Frame

## Overview

The purpose of this test case is to validate some of the analysis results of a 3D frame, specifically:

• Deflection
• Forces/Moments
• Linear Analysis

The Structural 3D results were compared against a third party analysis software.

Evaluation points: 3
Solve Type: Linear Analysis

## Model Setup

The structure is a 29-node, 28-member tower, that are predominantly fixed connections, supported by a series of pinned supports. The tower consists of 6.35mm x 6.35mm section for the main supporting elements, and a 1.5875mm x 1.5875mm section for the web members. Each section is composed of two different custom material.

## Analysis Results

Result Location SkyCiv Third Party Difference
Moment Z Member 17, Start Node -5.4670 kN-m -5.4726 kN-m 0.10%
Shear Y Member 23, End Node -4.3390 kN -4.3390 kN 0.00%
Reaction Y Node 9 16.03 kN 16.05 kN -0.12%
Deflection X Node 6 -0.0973 mm -0.0974 mm -0.10%
Deflection Y Node 15 -0.3227 mm -0.3229 mm -0.06%
Deflection Z Node 4 0.1104 mm 0.1094 mm 0.91%

## Design Results

Result Location SkyCiv Third Party Difference
Moment Capacity UR Member 1 (K=1.0) 0.093 0.093 0.00%
Shear Capacity UR Member 17 (K=1.0) 0.039 0.039 0.00%
Combined Axial Member 22 (K=1.0) 0.079 0.079 0.00%
Combined Axial Member 14 (K=1.0) 0.027 0.027 0.00%

## SkyCiv Free Frame Calculator

SkyCiv FREE Frame Calculator will generate and find the bending moment and shear force diagrams of a 2D frame structure. The free version allows you to input frames with a maximum of 3 members with applied point loads and moments for 2D frame analysis. Give the calculator a try or sign up for free today to get started with the software!