From the Job Site

Commonly wrapped around the outside of a structure, insulating sheathing is popular today because of demanding energy codes. Insulating sheathing is a foam insulated board material that reduces energy consumption. It does not have any structural ability and it requires additional lateral bracing to resist seismic and wind loads. Common types of insulating sheathing include polyisocyanurate, molded expanded polystyrene and extruded expanded polystyrene.

Wood patio decks are outdoor living spaces that are built above ground. While they typically adjoin a structure, such as a home, they can also be built as a boardwalk or be atop a building as an observation deck. The structure of a wood patio deck is commonly framed with treated lumber. While a number of different types of wood, including softwood, hardwood, domestic or tropical wood, can be used for the top surface deck, each has it's own advantages and disadvantages.

Pole framing or post-frame construction is a simple, cost effective durable design that was developed during the 1930s. Originally constructed with round utility poles, today's pole buildings utilize laminated columns or square posts. The poles or posts are joined to create a building frame that siding is attached to and rafters are rested upon and secured to. Pole construction has commonly been used to build garages, agricultural and equestrian structures, and airplane hangers, but can also be used in the construction of low rise commercial or residential structures.

Heavy timbers are a type of lumber that is differentiated from dimensional lumber by having minimum dimensions of 5 inches. Timber framing consists of joining heavy timbers together with pegged mortise and tenon joints, scarf joints or lap joints. Wood members of heavy timber framing are commonly known as post, beam, jetty, truss and brace. Historically, heavy timbers were hewn with axes or hand sawed. Today, CNC machines have modernized what was once a hand craft, allowing the industry to grow due to greater affordability of products and shorter lead.

Structural panels are energy efficient, composite panelized systems that are manufactured assemblies used in residential and light commercial structures. Types include structural insulated panel systems (SIPs) or stressed skin panels and cementitious reinforced panels. Used on roofs, walls and floors, structural panels can reduce the time it would take to complete a building envelope with standard materials. Structural panels offer various R-Values, weather resistance, fire retardation, and has the ability to meet extreme structural requirements.

Mechanically graded lumber is lumber that has been tested and evaluated by a machine rather than by visual inspection. While most lumber is visually inspected and graded, machine grading is a more efficient volume service and creates cost-competitive products, while differentiating the higher strength lumber materials. It is commonly used to deliver materials for more demanding applications. Two types of machines are used to grade lumber, machine-stress rated (MSR) lumber and machine evaluated lumber (MEL) machines.

Engineered wood materials are manufactured products that utilize strands, particles, fibers, and veneers of wood to produce a range of different types of products. Readily available at lumber yards, these products are cut to length in the field, similar to dimensional lumber. The application of engineered wood products is also similar to that of dimensional lumber; however, each offers its own performance and manufacturing advantages. Engineered wood products also have some disadvantages in comparison to dimensional lumber. They have less fire resistant, require more energy to manufacture, have adhesives that can potentially release toxins into the environment, and are prone to moisture damage. Engineered wood products are often used as columns, beams, girders, joists, purlins, rafters, studs and bracing.

Plastic fabrications are non-structural finish materials used in a variety of interior and exterior applications. Simulated stone fabrications, cultured marble, solid surfacing and quartz surfacing can be used as surface finishes on the walls and ceilings of interior spaces, around tubs and showers, and inside elevators. Plastic paneling, another type of plastic fabrication, offers a wall surface material that can be formed to simulate tile, bead board or any other type of pattern. Plastic railings are commonly found where wood railings would typically be installed. Similarly, plastic simulated wood trim and custom ornamental simulated woodwork can be used in applications where wood trim would normally be used. Plastic fabrications can be manufactured with virgin raw or recycled materials and offer a maintenance conscious material choice.

This topic covers information related to the treatment of wood with preservatives used in construction. Preservatives can be added to wood to prevent the growth of mold and deter insects. Methods of preservation include vacuum or pressure treatment with chemicals such as arsenic, copper, chromium, or borate, in addition to others.

This topic covers information related to the treatment or preservation of wood materials used in construction. Wood treatment increases durability and resistance, protecting wood from fire, moisture deterioration and insect infestation. Several types of preservatives and process exist to treat wood.

This topic covers information related to wood, plastic, and composite fasteners that are used in construction. Fasteners can be a hardware device that mechanically joins materials or a liquid mixture that bonds materials together. Fasteners include nails, screws, bolts, metal connectors and adhesives.

Metal stairs are an important component of most multi-story buildings and provide a variety of design options. Typical design configurations are straight run, L-shaped, and switch-back. Spiral stair systems fabricated from metal components are also common and offer many design options. A metal stair system can be designed as a multi-story self-supporting structural unit, independent of the building structure, or as a single flight of stairs that is structurally supported at each floor or landing. One of the biggest benefits of a self-supporting stair system is that it can be installed independently of the floor structure. More commonly, stair systems are designed in single flight segments and require structural support through a connection to a floor structure or vertical columns. Metal stair systems are fabricated at a metal shop or facility based on job-specific shop drawings and are delivered to the site in segments to facilitate erection.