Contributed by Eric D. Lussier
(Editor's Note: Before you start Part 2, please be sure you've read Part 1 here.
CUSHIONED SHEET VINYL
Vinyl, namely cushioned sheet vinyl or PVC, is one of today’s most popular synthetic surfaces for sports. Coming from a wide range of manufacturers in a variety of thicknesses, widths, colors and designs, the most common of these floors mimics the appearance of a traditional wood gym floor.
Premade in factories the world over, the vinyl is rolled up, packaged and shipped from the factory to a distribution house, the warehouse or a jobsite directly. The playing surface itself is typically pure vinyl and prefinished at the factory. Urethane prefinishes prevent the need to reapply annual finishes and help aid in cleanliness and maintenance of the floor. Any lines, lettering or logos are painted onto the surface of the rolled vinyl in the field.
Vinyl surfaces are very popular in elementary and middle schools, but also see installations in high schools, colleges, churches, YMCAs, daycare facilities and more. Built for sport usage of all types, cushioned sheet vinyl systems are heavily used for multipurpose areas. As water and liquids do not harm or, typically, stain the floor, it is common to see cafeteria and gymnasium hybrids — cafetoriums — receiving these types of floors.
Once prevalent, full-depth urethane surfaces have been mostly phased out and are now pad-and-pour or sandwich systems. Incorporating a recycled rubber pad that is adhered directly to the substrate or a slipsheet, the rubber has its pores sealed and is then coated with a 2 mm or 3 mm urethane lift. The lift is then coated with a color layer, offering one of the most popular synthetic surfaces on the market, which is also completely seamless.
Ideal for multipurpose usage, the overall resiliency of the rubber pad is more suited for heavy loads over the closed-cell foam of a cushioned sheet vinyl. While 4 mm, 7 mm and 9 mm are the most prevalent rubber pad thicknesses on the market, almost any thickness is available.
With all components manufactured in the factory, the pore sealer, urethane lift and painted wear layer are shipped to the job in pails in two- or three-part kits. Dozens of pails are mixed onsite, making conditions such as heat and relative humidity in the climate-controlled space to be of the utmost importance. Products are hand troweled or hand rolled upon the surface, and the final painted wear layer can be as thin as a piece of paper.
This painted wear layer can wear through in high-traffic areas, and it is typical for the floor to receive a new applied surface periodically, perhaps anywhere from five to 15 years depending on usage.
Contributed by Eric D. Lussier
The space is enclosed, the HVAC is running and the basketball backboards are in place. The final touch to your athletic facility is the only item outstanding: the sports floor. You have made your selection and the contractor is scheduled. All you need to worry about is the completed installation, right? Well, have you put thought into periodic maintenance? You always want your facility to look clean and new, but some floors take more work than others. The following provides insights into the various finish options and upkeep factors that must be considered when it comes to choosing from among the many athletic surface options.
It seems ridiculous to start the overview with what could seem like no flooring at all, but due to its lifespan and durability, concrete remains a choice in the athletic flooring market. If you are building a new facility, chances are concrete serves as your base substrate regardless of what floor surface is specified. And, whether it is intended for team or individual sports, or for multipurpose use, chances are those activities can occur on a concrete surface.
The downside of a concrete surface, however, is the safety factor. While a player may not think twice about shooting hoops on an outdoor concrete basketball court, that same person would likely be apprehensive about lacing up their high tops on an indoor concrete court. Why? Because concrete doesn’t offer any sporting characteristics, such as force reduction, also known as shock absorption. ASTM F2569, Standard Test Method for Evaluating the Force Reduction Properties of Surfaces for Athletic Usability, defines force reduction as the “ability of a surface to reduce impact forces as compared to a rigid surface using a specified impact.” Concrete on its own offers no force reduction.
ASTM F2569 was repackaged in the official sports flooring standard: ASTM F2772, Standard Specification for Athletic Performance Properties of Indoor Sports Floor Systems. In 2009, additional criteria were added for surface finish effect, which is the slip and grip of a floor, known as coefficient of friction.
Nevertheless, if team or court games will be played on a concrete surface, one important finish application is game lines. Pay attention to the coating used to mark lines on any athletic flooring, as heavy foot traffic and cleaning equipment can take a toll on the paint used. Typically, a polyurethane-based coating with a hardening catalyst is specified for longevity reasons.
The concrete surface may also receive a stain or a polish before usage. With these kinds of finishes, high-traffic areas will require upkeep much sooner than low-traffic areas, but one can expect to refinish the surface anywhere from five to 20 years, depending on usage.
Our next LIVE Fix Construction workshop will be with the Greater Lehigh Valley CSI Chapter in Allentown, PA this coming Wednesday, October 18th, 2017 from 6pm to 9pm.
We'll be hosted at the Holiday Inn Conference Center Lehigh Valley, PA, 7736 Adrienne Dr, Breinigsville, Pennsylvania. The cost is $30 for CSI Members / $35 for Non-Members.
Special rates for Young Professionals under the age of 35. Email Jon Lattin for details.
Please get more information here.
Contributed by Roy F. Schauffele
I opened up my business in Texas on July 4, 1987 and have been in continuous operation since then. When I came to Texas about 65 to 70% of the leak issues I dealt with were roof related, now the vast majority of building envelope leaks that I handle are related to the walls and windows. There are a variety of reasons for these problems:
We all need to realize that today’s walls are being designed for a 40+ year life span and we must adjust our thinking accordingly. Product warranties could be a good indicator of how long the product is anticipated to last. We must also realize that the total installed cost of a flashing system should be taken into serious consideration, and not just the cost of materials. The Brick Institute Association (BIA) has excellent Tech Notes 7 & 7A (Click for link) on this topic at www.gobrick.com/Technical-Notes. This is one of the reference resources I use.
Please remember that for through wall flashing to work properly, the flashing material/assembly must extend beyond the face of the mortar.
Today’s cavity walls are a chemical soup of ingredients:
Contributed by Elias Saltz
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.
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.
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