ASCE Risk Categories Explained

Background Building codes require that buildings be classified by their level of importance in determining the risk taken…


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

In terms of determining the risk category to a building component mounted to a building, the component 'inherits'…


ASCE 7 Main Wind Force vs. Components & Cladding Explained (MWFRS vs. C&C)

ASCE 7 separates wind loading into three types: Main Wind Force Resisting System (MWFRS), Components and Cladding (C&C),…


How to use the ASCE 7-10 Components & Cladding Wind Pressure Calculator

If you'd prefer to hear this in Spanish, use the video below. Si prefiere escuchar esto en español,…


ASCE 7 Basic Wind Speed

Per definition by ASCE 7-10, Section 26.2 is defined as:   BASIC WIND SPEED (V): Three-second gust speed at 33ft…


About ASCE 7’s Directionality Factor Kd

The directionality factor (Kd) used in the ASCE 7 wind load provisions for components and cladding is a…


ASCE 7 Wall and Roof Zones Explained

Per ASCE 7-10, buildings are composed of 5 different zones, depending on the wind loading they are subjected to.…


ASCE 7 Least Horizontal Dimension

The Least Horizontal Dimension can be taken as the shortest possible distance that can be taken between two parallel…


Mean Roof Height (ASCE 7)

Per ASCE 7, the Mean Roof Height (h) is defined as the average of the roof eave height and…


ASCE 7 EXPOSURE CATEGORIES AND HOW EXPOSURE ‘D’ WORKS

About Exposure D Exposure 'D' is a multiplier when converting wind velocity to wind pressure that represents coastal…


Did the loading requirements change for rooftop structures for ASCE 7-10 and the 2014 Florida Building Code?

YES. The loading requirement of "Rooftop Structures" has been revised in ASCE 7-10.   Essentially, buildings less than…


Starter List in Evaluating Your Building Component For Product Approvals & TER’s

Designers and manufacturers create building products based on how they think people will use them and conditions they…


Flood Engineering Glossary

FLOOD GLOSSARY The following is provided as a curated summary of terms taken from the referenced standards that…


Flood Resistant Design & Floodproofing of Buildings

An engineer's walk through of the design requirements for flood resistant design of building components With Engineering Express's…


Is Steel or Reinforcing or Fibermesh Required in Posts & Footings of Building Components?

INTRODUCTION The main purpose foundations serve is to distribute and resist the forces or loads experienced by the…


Design Pressures for Windows Mobile Calculator Help Directory

What is Exposure D? What is Enclosure Type? Help Me Find Wind Speed What is Kd? How to…


How to Find Wind Speed Using the Applied Technology Council Hazards by Location Website

The Applied Technology Council (ATC) offers site-specific information that is used in our calculators to determine the wind…


Wind Speed vs. Wind Pressure Explained

Many who don’t understand how wind works will state a product is rated to a specific wind velocity…


Is a large missile impact window or door automatically approved for small missile impact?

If a product is rated for Large Missile Impact (LMI) and has laminated glass as an infill, then…


Phantom Screens: Is a Florida Product Approval Required?

Product Approvals for building components are the general rule in Florida.  Building officials, architects, insurance companies, even homeowners…


Frost Protection For Concrete Footings On Grade – Heave

Section 1809.5 of the Florida Building Code (2017) and 2012, 2015 & 2018 International Building Code describe the…


What are porosity and closure angles when defining a porous building opening?

Explanation In the event of a high wind event, it is the concern of building codes ASCE-7 and…


What is a canopy awning & which wind forces should I use to design?

Note:  Updated March 2018 in response to 3 negative user feedback comments for more information.  Please thumb this…


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…


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

A building is considered open if each wall is at least 80 percent open (ASCE 7-10, Section 26.2,…


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 7-10, Section…


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…


The Recently Updated Saffir-Simpson Scale

First, it needs to be said that there is a complicated formula that converts wind velocity to wind pressure. …


The One-Third (1/3) Stress Increase: Where Is It Now?

The one-third stress increase has a long history of use in Allowable Stress Design (ASD). It is most…


Should a professional utilize the ASD (“Allowable Stress Design”) method or the LRFD (“Load Resistance Factored Design”) method when calculating the required wind pressure for use with tested / approved systems?

Most all products are evaluated using the ASD method (unless noted otherwise). ASD method in, then ASD method…