Contributed by Cherise Lakeside and Eric D. Lussier
LetsFixConstruction.com was born on a whim a little over a year ago. A glimmer of an idea based in a passion to help our industry improve. A thought that we could bring all members of our industry, from all disciplines, to the table to collaborate and share knowledge rather than to continue to complain or point fingers.
We launched this effort with no real solid plan for what it would look like or how we wanted to make it happen. We just knew that we wanted a place where we could all come together with positive, forward thinking solutions and a place to share knowledge for better understanding, resulting in an improved project delivery process and built environment. We’re presently calling it ‘visionary logic’ but we are still looking for a better phrase than ‘thinking outside the box’.
With a ‘Go Big or Go Home’ attitude, we decided to just run with it and see where it would go. We can honestly say that neither of us were quite prepared for the response. It was clear to us, from very early on, that people needed this place. People in our industry were hungry for a place to stop complaining and get better.
We started with blogs. We wrote some of them and invited friends, peers and guest bloggers to write others with a simple premise: Pose a problem you face and your perspective on how to make it better. Share your knowledge. It’s that simple. A little over a year in, our stable of guest bloggers is over 24 knowledgeable industry professionals and growing.
Somewhere midway through our first year, after seeing such an overwhelmingly positive response to the blogs, we brainstormed ways to take it even further. With two brains that are constantly in high gear and a passion to go bigger, we thought ‘What if we could take these problems that people face and get them talking about them? Face to face, at the same table.’ In the blink of an eye, our Let’s Fix Construction Workshop was born. A problem solving, interactive and dynamic event geared at getting people to openly discuss issues in our industry with people they often don’t appropriately communicate with.
We now have eight workshops under our belt with a ninth and tenth in Atlanta on November 13th. In addition, we have at least eight workshops tentatively planned for 2018 and have added a slate of other programs to our growing list outside of our namesake session. Again, the response was overwhelming. Again, we found that our industry NEEDS this environment of sharing in a positive manner, more now than ever. We hope to do these workshops and presentations all over the country. Maybe even the world!
So why did it feel like something was still missing?
I’ve been receiving a lot of positive feedback on the Misconception Series and I’m happy to continue writing it. I want to especially thank Eric and Cherise for encouraging me to add more posts on more topics. I hope that among all the other great things the LFC project is doing to fix construction, my little corner dedicated to dispelling misconceptions is helpful. I’m especially grateful to the manufacturer’s technical reps who agree to participate and relate the common misconceptions and help fill in the correct information.
For those of you new to the misconception series, I encourage you to read the introductions to my two previous entries so you will know what it’s all about. (Editor's Note: Read post one on Gypsum Board here and Aluminum Framed Storefronts here)
The reps I chose to approach for this post, Kim Shaw, along with her Technical Service Manager John Dalton of GCP Applied Technologies and Scott Baiker from Isolatek, are both active and involved CSI members that I’ve come to know well over my career. I consider them my trusted advisors when it comes to questions about their companies’ lines of fireproofing products. I’m not promoting their products over their competitors’ - it’s far more about the individual reps than the companies that they work for.
07 81 00 - Spray-Applied Fireproofing
Introduction to Fireproofing
Fireproofing, as covered by this specification section, typically refers to an application of a spray-applied fire-resistive material (SFRM) to steel structural framing or decking, which then greatly prolongs the time that the structure survives during a fire. Unprotected steel is extremely vulnerable to heat. “Critical failure of steel occurs when the steel reaches 537°C (1,000°F). At this point, unprotected steel is reduced to 60% of its original strength, is prone to bend and deflect and the structural load stability and physical characteristics of steel is compromised (1).” However, it doesn’t need to be nearly that hot to cause catastrophic failure; it will begin to lose strength beginning when it reaches about 300°C (572°F). Fireproofing works by insulating the steel, thereby delaying how quickly it heats up and increasing the duration that the structure will survive, allow occupants to escape, and gives emergency responders confidence that they have time to safely enter the building and fight the fire.
Contributed by Lori Greene
This issue continues to arise on a regular basis, so I’m hoping to clarify it once and for all. The sections entitled “Access-Controlled Egress Doors” – present in both NFPA 101–Life Safety Code and past editions of the International Building Code (IBC), have led some to believe that all doors equipped with access control readers must comply with these sections of the model codes. Although the Authority Having Jurisdiction (AHJ) has the final say on matters of code-compliance, it’s not the intent of the model codes for these sections to apply to all access-control doors or to all doors with electrified hardware.
The requirements of the model codes specific to access-controlled egress doors are essentially the same, but in the 2015 edition of the IBC, the section title was changed to Sensor Release of Electromagnetically Locked Egress Doors. The reason for the change was to help avoid confusion about when this section should be applied. The corresponding section in NFPA 101 is still called Access-Controlled Egress Doors, but the two sets of requirements are very similar despite the differing section titles.
What’s an access-controlled egress door?
These two sections apply to electrically/electromagnetically locked doors, where the lock is released by a sensor detecting an approaching occupant. The most common type of lock that is used in this application is an electromagnetic lock (AKA mag-lock), but the section could also be used for other types of locks that are released by a sensor – for example, a power bolt. The key is that the section only applies to locks that are released by a sensor which detects an approaching occupant and unlocks the door. Most other types of electrified hardware – electromechanical locks, electrified panic hardware, electric strikes – are released by “normal” means, like turning a lever or pushing on the touchpad of the panic hardware. These are not access-controlled egress doors.
What about mag-locks released by other means?
Not all doors with electromagnetic locks are released by a sensor or required to comply with these sections of the model codes. Both the IBC and NFPA 101 also include separate sections that apply to electrically/electromagnetically locked doors that are released by door-mounted hardware incorporating a switch to release the electrified lock. Many locks used for access control are released without the use of a switch, but because mag-locks require a separate release device – a sensor or a switch in the door-mounted hardware – mag-lock applications are typically released by one of these two types of switches. In NFPA 101, the section for mag-locks released by a switch in the door-mounted hardware is called Electrically Controlled Egress Door Assemblies. In the IBC, this section is currently called Electromagnetically Locked Egress Doors, but beginning with the 2018 edition of the IBC, this section will be called Door Hardware Release of Electrically Locked Egress Doors.
What are the requirements for each of these applications?
As a consulting specifier, my clients come for my expertise. To bolster my knowledge, I frequently find myself in conversations with product reps, talking about the nitty-gritty technical aspects of their products. These conversations delve into a far deeper level of detail than I would previously get when I was a ‘normal’ design architect and project manager. Over the course of those conversations, I am occasionally surprised that things I thought I knew a lot about were based on misconceptions. In fact, even things that I considered “common knowledge” have been shown to be wrong, or at least over-simplifications. Armed with accurate information, I can pass correct technical advice on to my clients, hopefully dispelling those misconceptions one person at a time, one project at a time.
Misconceptions can be found across the spectrum, in every product category and in every MasterFormat number. I thought it would be fun and enlightening to ask my go-to reps in a wide variety of product categories to tell me the biggest and most common misconceptions they hear as they work with designers and architects, and present their responses here. In each post, I’ll relate my discussion with reps in one category or one MasterFormat header.
The reps I chose to approach for this post, Kurt Wenzel from YKK AP and John Stelter from EFCO Corporation, are both active and involved CSI members that I’ve come to know well over my career. I consider them my trusted advisors when it comes to questions about their companies’ lines of fenestration products. I’m not promoting their products over their competitors’ - it’s far more about the individual reps than the companies that they work for.
08 43 13 - Aluminum-Framed Storefronts
Introduction to Storefronts:
Webster defines storefront as “The front side of store or store building facing a street.” The use of storefront products dates all the way back to the 1930’s, and the systems of today have changed very little from the original design. The design intent of the storefront sash and glass originally was to allow for shopkeepers to display their wares to pedestrians who would pass by their stores. They aimed to entice them to stop and look with the hopes of attracting them inside.
Aluminum-framed storefronts are basically extrusions of aluminum that are fabricated and assembled to allow for glass (or other infills) to be installed into the system, providing a see-through weather barrier between the inside and outside of the building. The extrusions are normally 1-3/4 to 2 inches wide by 4 to 4½ inches deep; systems 6 inches deep are available from some manufacturers. Systems intended for use on buildings’ exteriors usually are fabricated with a thermal break lined up with the center of glass. The thermal break reduces heat energy loss through the system, preserving energy and minimizing condensation. That thermal break is omitted when the storefront is located on the interior, such as in a vestibule.
With storefront systems, the entire extrusion is structural, there are no non-structural pressure caps or decorative covers like there are in curtain wall systems. Multiple configurations are available, and all are conceptually equivalent, other than the plane of the glass. Configurations include structural glazed, front, center, and rear glazed systems.
CSI’s Specifier Practice Group recently held a webinar session discussing how storefronts, windows, curtain walls and window walls are made and how they’re distinguished from one another in performance and in their use. The video of that webinar is available here.
As a consulting specifier, my clients come to me for my expertise, and to bolster my knowledge I frequently find myself in conversations with product reps, talking about the nitty-gritty technical aspects of their products. These conversations delve into a far deeper level of detail than I would previously get when I was a ‘normal’ design architect and project manager. Over the course of those conversations, I am occasionally surprised that things I thought I knew a lot about were based on misconceptions. In fact, even things that I considered “common knowledge” have been shown to be wrong, or at least over-simplifications. Armed with accurate information, I can pass correct technical advice on to my clients, hopefully dispelling those misconceptions one person at a time, one project at a time.
Which leads me to the idea for this series of posts. Misconceptions can be found across the spectrum, in every product category and in every MasterFormat number. I thought it would be fun and enlightening to ask my go-to reps in a wide variety of product categories to tell me the biggest and most common misconceptions they hear as they work with designers and architects, and present their responses here. In each post I’ll relate my discussion with reps in one category or one MasterFormat header. So without any further ado, today’s Misconceptions.
The reps I chose to approach for this post, Andy Vegter from USG and Thad Goodman from National Gypsum, are both active and involved CSI members that I’ve come to know well over my career. I consider them my trusted advisors when it comes to questions about their companies’ lines of gypsum-based products. I’m not promoting their products over their competitors’ - it’s far more about the individual reps than the companies that they work for.
Without any further ado, today’s Misconceptions.
09 29 00 - Gypsum Board
I asked Andy and Thad this question:
“When you think about the questions and comments you hear from design professionals across all levels of experience, what misconceptions about gypsum products do you find that you most commonly have to dispel?”
First, this brief introduction - What is gypsum/gypsum board, anyway?”
Gypsum is a natural mineral, chemically made up of calcium and sulfur bound to oxygen and water. It is found naturally in sedimentary rock formations, with some of the world’s largest natural reserves in North America. A synthetic version, which is a byproduct of coal burning electric power plants, is chemically identical to natural gypsum. Some gypsum board manufacturing plants are fed with mostly synthetic gypsums and others are built over a mine where the gypsum is coming out of the ground. Synthetic gypsum is considered a recycled material by sustainability rating systems, so projects seeking certification can specify that gypsum panels be made up of 90% recycled content. It’s important to remember that not all products are available from plants that use synthetic gypsum.
Gypsum board is manufactured when gypsum is mixed with water and additives to form a slurry which is then fed between continuous layers of paper or another type of facer. Through a chemical process, the slurry hardens to its original rock state, and the facer becomes bonded to the gypsum core. The boards are then cut to size and dried.
What follows are some of the most frequent misconceptions and misunderstandings that the reps related, followed by the correct information.
Let's Fix Construction is an avenue to offer creative solutions, separate myths from facts and erase misconceptions about the architecture, engineering and construction (AEC) industry.
Get blog post notifications here