ASCE-7

roof snow load

What’s the difference between ground and roof snow load for patio covers?

When designing outdoor structures like patio covers, one of the most critical factors to consider is the ability to support snow loads.  In regions that experience significant snowfall, the weight of snow can exert considerable pressure on a structure, making it essential to understand how snow accumulates and affects different parts of a building. Two …

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Snow Over Pergola

Snow Build-Over On Pergolas, Trellises & Mechanically Louvered Roofs (Cornice Effect)

Beware of Snow Buildup On Open Roof Areas An important and frequently overlooked requirement for checking snow loads on open roof systems such as pergolas, trellises, and mechanically louvered roofs is the snow ‘buildover’ effect.  This occurs when the snow accumulates on open patio roof components to the point where it builds ‘up and over’, …

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Instructions for proper use of rooftop equipment wind pressure calculator

HELP PAGE For the Engineering Express® Rooftop Equipment Wind Pressure Calculator Note: See Limitations & Conditions of Use at the end of this article. Quick Links Access The Calculator View The Glossary Learn Even More   Calculator Inputs 1) Ultimate Wind Velocity (Vult): This is the peak 3-second Ultimate gust wind speed. Consult your building …

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ASCE 7 Wall Zones Explained

Key Terms Used In This Article For Reference: Mean Roof Height (h) Least Horizontal Dimension More on ASCE 7 Components & Cladding Understanding Wall Zones 4 & 5 An analysis of wind pressure acting on a building component (window, door, etc.) is performed depending in part on what wind pressured zone it is in (see illustrations …

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ASCE 7 Least Horizontal Dimension – Minimum Building Width

From ASCE 7 (ASCE 7-22,16, 10 & previous standards):   The “Least Horizontal Dimension” can be taken as the shortest possible distance that can be taken between two parallel lines that fully encompass the building The Least Horizontal Dimension is further demonstrated as follows: Where ‘B’ is the Least Horizontal Dimension.   For further reference, see our …

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ASCE 7 Basic Wind Speed

Per definition by ASCE 7-22, ASCE 7-16 & ASCE 7-10, Section 26.2 is defined as:   BASIC WIND SPEED (V): Three-second gust speed at 33ft above the ground in Exposure C (see Exposure Categories) as determined in accordance with ASCE-7  Section 26.5.1. The wind shall be assumed to come from any horizontal direction. The basic …

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Glossary of Engineering Terms

Glossary of Building Component Engineering Terms & Abbreviations These terms are published by Engineering Express to coincide with help menus for our online tools & published articles and as they relate to the Building Component Design industry. See also our FLOOD ENGINEERING GLOSSARY for more terms related to flood engineering. See Also SUNROOM TERMINOLOGY for …

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