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About ASTM E1996-17 Missile Levels

Overview As of the 2020 Florida Building Code & 2018 International Building Code, ASTM E1996-17 is the adopted reference standard.  The title is ‘Standard Specification for Performance of Exterior Windows, Curtain Walls, Doors, & Impact Protective Systems Impacted by Windborne Debris in Hurricanes’. (Exterior garage doors & rolling doors are covered by ANSI/DASMA 115 & …

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The Updated Saffir-Simpson Scale

First, it needs to be said that there is a complicated formula that converts wind velocity to wind pressure.  Many wind pressure values can exist from a single wind velocity which vary based on roof height, topography, terrain, even code version, and more. The Saffir-Simpson Hurricane Wind Scale is a 1 to 5 rating based …

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ASCE Wind Speed Risk Category To Use with Signs & Building Components On-Off Buildings

ASCE 7-10, ASCE 7-16 Wind Pressure Information and Wind Pressure Calculators In terms of determining the risk category to a building component mounted to a building, the component ‘inherits’ the design properties of the structure. So a sign attached to a risk category II structure would be risk category II. If the sign is freestanding …

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Glossary of Engineering Terms

GLOSSARY OF ENGINEERING TERMS 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 a list of Sunroom …

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How do I tell if my building is considered “enclosed”?

A building is considered “enclosed” if it does not comply with the requirements for open or partially enclosed buildings (ASCE 7-16, Section 26.2, “BUILDING, ENCLOSED”). From the ASCE 7-16 Commentary C26.2 Definitions: BUILDING, ENCLOSED; BUILDING, OPEN; BUILDING, PARTIALLY ENCLOSED; BUILDING, PARTIALLY OPEN: These definitions relate to the proper selection of internal pressure coefficients, (GCpi). “Enclosed,” …

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How do I tell if my building/enclosure is considered “partially enclosed”?

A building is considered “Partially Enclosed” if it complies with both of the following conditions (ASCE 7-16, Section 26.2, “BUILDING, PARTIALLY ENCLOSED”): the total area of openings in a wall that receives positive external pressure exceeds the sum of the areas of openings in the balance of the building envelope (walls and roof) by more …

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How do I calculate the effective opening area on window or door products? – What opening area should be used for wind pressure determination on a multi-panel product?

The Building Codes in the US reference ASCE-7 for the design of the components and cladding of buildings (26.1.2.2 ASCE 7-10 & ASCE 7-16).   Theory Of wind design goes that the smaller the area in consideration, the greater the probability that a maximum burst of wind will occur in that area over any 3 …

How do I calculate the effective opening area on window or door products? – What opening area should be used for wind pressure determination on a multi-panel product? Read More »

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