Principles of Agricultural Structures
description
Transcript of Principles of Agricultural Structures
Objectives• Identify and describe the characteristics of
the 4 major building types used in agriculture.
• Describe primary building structural components.
• Describe the types of loads acting on buildings.
• Interpret building plans.• Perform basic design calculations.
Major Building Types used in Agriculture
• Stud Frame Construction
• Pole (or post) Frame Construction
• Rigid Arch Construction
• Masonry Construction
Primary Building Components
Foundation
Wall
Roof
Footing
Roof:
Weather protection.Lateral support of exterior walls.
Walls:Weather protection.Support vertical loads.Resist lateral loads.
Foundation and Footing:Transfer all structural loads to soil.
Soil:
Supports all building loads.
p. 65 of text.
Roof Pitch
Expressed as:A. “Rise per foot of Run” or asB. “Fractional Pitch”
EXAMPLE
Rise = 3’Run = 12’
Hooke’s Law
1-lb
2-lb
3-lb
4-lb
5-lb
Strain is proportional to stress within the elastic limits of a material.
Types of Building Loads
• Dead load – Weight of building materials.
• Live loads– Moveable load – Building contents that can move but are
generally stationary for extended periods.– Moving load – Building contents that move often.
• Snow load – Vertical load from weight of snow on roof.• Wind load – Pressure acting on roof and walls due to
horizontal wind.
A well-designed and constructed farm building will:• Withstand all “normal” loads without
structural failure.• Be as economical as possible (but no more
than possible!)• Efficiently serve its intended function• Have capacity for expansion• Be integrated into existing and intended
facilities plan