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ASCE 7 Wall Zones Explained

ASCE 7-16 has expanded on the definition of component & cladding zones from previous ASCE 7 standards  …


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 Least Horizontal Dimension

From ASCE 7 (10, 16 & previous standards):   The "Least Horizontal Dimension" can be taken as the…


ASCE 7 Basic Wind Speed

Per definition by ASCE 7-16 & ASCE 7-10, Section 26.2 is defined as:   BASIC WIND SPEED (V):…


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 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),…


ASCE 7 EXPOSURE CATEGORIES AND HOW EXPOSURE ‘D’ WORKS

Overview   ASCE-7 is the governing referenced standard for design loads on buildings & other structures for building…


ASCE Risk Categories Explained

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


Wind Speed to Wind Pressure For Sunrooms – Canopies – Pergolas Using ASCE 7-16

ASCE 7-16 is introduced into the 2018 International Building Code and 7th Edition Florida Building Code (2020) as…


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'…


Did the wind loading requirements change for rooftop structures for ASCE 7-10 – 7-16 & The Florida Building Code?

Regarding ASCE 7-16 & the 2020 Florida Building Code (FBC)   YES. Section 1609.1.1 and Chapter 35 of…


Instructions for proper use of rooftop equipment wind pressure calculator

Instructions For Proper Use of the Engineering Express® Rooftop Equipment Wind Pressure Calculator Note: See Limitations & Conditions…


About ASTM E1996-17 Missile Levels

Overview As of the 2020 Florida Building Code & 2018 International Building Code, ASTM E1996-17 is the adopted…


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

A canopy is a structure which provides overhead protection from the elements such as rain, snow, or sunlight.…


The Updated Saffir-Simpson Scale

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


How To Determine Uplift Reactions For Canopies-Carports-Pergolas

Canopies & Wind   Understand this - A backyard canopy attached to the back of your house, a…


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…


What wind speed should I use for my project?

The answer varies with location and type of building.  There are several 'risk categories' associated with a location…


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

Overview Changes to the 2020 Florida Building Code for Porous Impact Protection Devices Porous Impact Protective Systems: ASTM…


What wind information is required for construction documents?

From the 5th, 6th &7th Edition of the Florida Building Code (2014, 2017, 2020) section 1603.1.4 as well…


How to Find Wind Speed & Snow 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…


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…


Test Laboratories

The information contained herein is offered as an unbiased list of firms and services that compliment the services…


Calculator Glossary of Terms

Here's a summary of our Online Calculator & General Terms. These terms are collected from numerous online sources…


2020 FBC Product Evaluation Updates

There are many updates to the Florida Building Code 7th Edition (2020), but several of them directly impact…


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…


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…


Case Study: 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…


About Porosity & When is a Fence or Railing 75% Open?

The Scenario The question comes up from time to time regarding requirements for a fence or railing to…


Frost Protection For Concrete Footings On Grade – Heave

Concrete Footing Frost Protection - An Explanation Section 1809.5 of the Florida Building Code (2020) and 2015 &…


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 7-16, 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 7-16, 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 One-Third (1/3) Stress Increase: Where Is It Now?

While the 1/3 stress increase is all but a memory, this article explains its history & origin. The…


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…


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