continuous. "L" type extensions off of rectangular ceilings are discussed in the literature as a very common gypsum board cracking point. strip off one side of my birch plywood. In short, do I want to put the joint on the framing or between it? The forces from the two drywall segments are pushing towards one another on the same joist. Then use the following guidelines to help put dimensions on your plant. Really? house? etc.’ Technical Report 127. This is a two-person job. Shelf supports: (A) European style (requires 5 mm metric drill bit; (B) Angle style, available with plastic button or coating for glass shelves; the hole allows you to screw the shelf on tightly; (C) locking style (pin holds 3/4-in. Josh And by using a factory corner as a guide for crosscuts (when you cut the parts to length), you can cut off each piece perfectly square (Photo 4). I have both 2x ceiling joists and open web joists composed of 2x4’s. Note that Philips says this type of joint that they sell is mostly for plaster work anyway. Tip: if you set your saw blade to cut only 1 in. What you decide here will determine which material you use. Screws 16" O.C. Finally glue and screw (1-3/4 in. PO Box 1983 John, if you can add a few building details (photos would be helpful) such as overall dimensions and type of structure that would help me research & comment more accurately. The Trim-Tex drywall expansion joint product (illustration adapted from Trim-Tex product literature) includes masking (green arrow) and breakaway tabs (red arrow) that are removed before final sanding and painting. Standard Drywall. Finally, assemble and fit the top. If you adjust the guide so the blade cuts just to the waste side of the line, you won’t splinter the wood, as shown in Photo 5. Another option We are using eight-foot sheets vertically. The design you’re about to see satisfies both requirements. Others, as you mentioned, just leave a gap between the two sheets and cover it with a piece of trim (attached to one side only). "Design Essentials for Controlling Movement Induced Stresses in Building Materials", Winstone Wallboards, Ltd., Winstone Gypsum, Dec. 2009, Winstone Wallboards Ltd 4' by 10': $11 per sheet. Line it up with the sides, clamp it, drill, and move it up. This allows each leg of the joint to be then use a roller (a glass bottle or wood block works too) to press the edging down until the glue cools and hardens. Follow the same steps that professionals and large companies use to count drywall sheets, mud, tape, screws, and corner bead. He looked up joist spans and railing heights and cut and assembled his deck - it was cut as if by razor blades, every joint and board was perfect. ASTM C 473, the most comprehensive gypsum board standard specifies the flexural strength of gypsum panels, specifies the allowable water absorption and maximum deflection in humidified gypsum board for interiors, for ceiling board, and for exterior gypsum soffit board. It lists the advantages and disadvantages of common 3/4-in. Note that some folks successfully repair cracks in existing drywall by grinding out a space/groove in the cracked joint and installing a V expansion joint. Other Boral Plasterboard offices are in New South Wales, Northern Territory, Queensland, South Australia, Tasmania, Victoria, Western Australia, and the company has an export department. DWFC. Finally glue and screw (1-3/4 in. Here is are quotations from various sections of a detailed specification from National Gypsum Company's Gypsum Board Systems, 12th Ed. Next, prepare the center divider by cutting 3/4 x 4-in. This design has eliminated complicated joints so even a novice can quickly nail together either heavy-duty utility shelving for the garage or good-looking bookcases for the family room, like the one in the opening photo. How many sheets of drywall do I need for 1,000 square feet? While many other materials work well, 3/4-in. It was completely rotted. staples 6" o.c. Christchurch There’s always more than one good way to build a shelf. 6 drywall screws) the top and bottom braces in place (Photo 16 and Fig A). To keep pace with the accumulation and to keep favorite items within easy reach, every homeowner needs a simple recipe for knocking together a batch of shelves at a moment’s notice. Some people say that is plenty of screws, some say use more. Remove the base trim to the shelving sits flush against the wall. www.british-gypsum.com. Nail on the front brace (Fig. Well-designed shelves won’t sag. But perhaps by limited experience or lack of exposure to literature on the topic, she doesn't know that there are things she doesn't know. They’re more than 1-in. Instead all of the 60-foot length force is concentrated on a single framing member. The space between the two framing members forms a completely free gap. Tip: Simplify your finish work by making smooth saw cuts every time. Gold Bond - 8 ft. x 4 ft. x 1/2 in. Clamp the factory corner of plywood for a perfect right-angle crosscut guide. If you are not on a budget, utilizing 3 tubes per sheet will improve performance. Use a hot iron to press the iron-on veneer onto all exposed plywood edges. Click to Show or Hide Citations & References, INTERIOR FINISHES: BEST PRACTICESPRACTICES, ASBESTOS-SUSPECT DRYWALL ENCAPSULATE in PLACE, COATING TYPE CEILING & WALL SURFACES: CATALOG OF, DRYWALL & GYPSUM BOARD COMPOSITION & HISTORY, MASONITE & HARDBOARD CEILING & WALL COVERINGS, Metal Lath Specifications, Specification for metal lath and accessories, Lath and Plaster, HOME INSPECTION EDUCATION COURESES (Canada), HOME INSPECTION EDUCATION: HOME STUDY COURSES, Coefficient of expansion of drywall due to temperature variation: 0.0162, Coefficient of expansion of drywall due to moisture level changes: 0.0072. Stronger 3/4-in. thick). It is less common to find drywall movement control joints in residential construction except where regular building movement is anticipated. But, I’m trying to understand why it would be bad to have the joint directly on top of a framing member for my case. If all four holes that support a shelf don’t line up exactly, the shelf will have an annoying wobble. Does the 093 expansion joint need to go full height to the deck or can it go just 6" above the acoustical ceiling? 1) Living Room ceiling looking west. The only way I can see an EJ helping my ceiling is to put one along the east and/or west ends (between wall and ceiling—along the parallel framing sides). New Zealand, Tel: +64-9-633-0100, Email: gypsum@gib.co.nz, Toll free: 0800 475 475. Depending on the distances involved, the control joint we show in the center of the long ceiling expanse at the sketch bottom might have been placed at the end of the partition wall. draw a light pencil line so you can erase it later.). The old saying “Measure twice and cut once” is good advice here. John, As with many construction guidelines if the bad thing that we are worried about happened 100% of the time then people would be more rigorous about these standards. This time, use one factory corner of your plywood (which will be exactly a right angle) for a guide, clamping it so the long factory edge is even with one edge of the shelf. Obviously, on these shelves, you see a lot of those edges. A conventional 1/2-inch thick sheet of drywall measuring 4-foot by 8-foot weighs around 57 pounds. Hang Drywall with Adhesive. Screw the two back braces in place wherever the screw/heads won’t show. higher than your base trim (Fig. If I put the joint between framing on the ceiling, will it sag? Tapered edges for smooth joints. So the drywall can’t slide to an EJ that’s placed mid-room anyway. That’s not my intent. Any EJ usage should be provided at the wall/ceiling junction; not mid span. attached over separate studs. The drywall expansion joint control strip's flanges are attached to the surface of the drywall with drywall screws, nails (ick), or spray adhesive, or in one product case, adhesive tape. When the shelf is in place, you’ll hardly notice them, although the vertical series of holes looks like the work of a very precise woodpecker. Recommended Specification for Preparations of Gypsum Board Surfaces Prior To Texture, GA. GA-214, Recommended Levels of Gypsum Board Finish. The longest un-broken section of drywall was less than 27 feet in its longest dimension. Not every building is identical in humidity range, temperature range, framing materials, fasteners, and other variables. If you intend to put a full-width expansion joint in this ceiling, you'd place the first one is just where you show it - a red line in our annotated version of your sketch. Tape: $.02 per sq. Also know, how much does a sheet of UltraLight drywall weight? The bottom piece, which was not scored, splintered when we sawed it. • Wallboard nails (per ASTM C514) for 1/4", 3/8" and 1/2" thick panels: 1-3/8" nails • 1-1/4" Type W bugle head screws; screw gun or electric drill with special bit • Panel adhesive (per ASTM C557 for wood framing).
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