Lumber is stamped with a grademark to show its grade. The American Lumber Standard Board of Review set the standards and qualifies grading agencies. Each grade stamp shows the name or symbol of the agency, the number of the mill, the species group, the grade and the classification S-DRY of S-GRN. S-DRY indicates that the lumber has a moisture content of 19% or less after being kiln dried. S-GRN has a moisture content greater than 19%. The following is a facsimile of a grade Stamp.
According to tests designed and approved by the American Wood-Preservers' Association, the new treated lumber is more corrosive to fasteners than the old CCA (Chromated Copper Arsenate) treated wood. The Manufacturers of ACQ® (Alkaline Copper Quat), CA (Copper Azole Type A and B) and SBX (Sodium Borate) and the treated wood industry are all recommending hot-dipped galvanized and stainless steel nails and screws with their treated wood products. Fasteners must meet the ASTM A-153 specification for hot-dipped galvanizing.
When selecting deck fasteners, framing nails, decking nails or screws, take note of the holding capacity and the resistance to corrosion. When quoting an outdoor construction project for a client, encourage them not to skimp on the fasteners. Using the wrong fasteners can compromise the appearance, longevity, and safety of their project.
Many fasteners traditionally used with treated lumber are no longer recommended for this application. Dacrotized, electroplated, brass and aluminum fasteners should not be used in treated lumber when the visible appearance of rust or the likelihood of corrosion is unacceptable.
GOOD - Nonmetallic finish:
Includes but is not limited to triple coated screws first galvanized then covered with a ceramic or Teflon (or similar material) layer with top sealer coat.
BETTER - Hot-Dip Galvanized.
The requirements for use with treated wood should conform to the following ASTM Standards: ASTM 153 (for Hot-Dip fastener products) and ASTM-A 653 (Coating Designation G-185 for Hot-Dip connector and sheet products). NOTE: Hot Galvanized does not equal Hot Dip Galvanized.
BEST - Stainless Steel:
Stainless steel fasteners and connectors are required for Permanent Wood Foundations below grade and are recommended for use with treated wood in other severe exterior applications such as swimming pools, salt water exposure, etc. Type 304 and 316 are the recommended grades to use.
Manufacturer Recommended Fasteners and Hardware:
There may be additional products (other than stainless steel or hot-dip galvanized) that are suitable for use with ACQ treated wood. Please consult with the fastener or hardware manufacturer for use recommendations.
Install only the specific nails. The flanges of wood I-Joists may split if larger diameter nails or longer nails are installed. Do not install nails larger than 16 penny common (0.162 inch diameter) into the web stiffeners in the wood I-joist.
Pattern the nails used to install backer blocks or web stiffeners in wood I-Joists to avoid splitting the block. The nail pattern should be sufficiently spaced and avoid the same grain line, particularly with solid sawn backer blocks. Backer blocks must be installed on the wood I-joists acting as the header, or supporting member. Install in accordance with the I-joist manufacturer's installation guidelines with the backer blocks seated against the bottom flange of the supporting header when using the face mount hangers, and against the top flange if using the top mount hangers. The nails installed to hangers mounted to an I-joist header must penetrate through the web and into the backer block on the opposite side.
SBS = Staple Bostitch Standard
To convert "Rafter Span" to Sloping Distance":
If slope is 4 in 12 and rafter span is 12'-6", the sloping distance = 12.5 x 1.054 = 13.175' or 13'2".
(Note:the over-all rafter length depends on the length of the overhang.)
Note: the birdsmouth notch should be limited to 1/3 the rafter width to maintain 2/3 of the rafter section.
From chart below determine how many pieces of siding are required.
Fiberglass combines high thermal efficiency and light weight. It is resilient, versatile, economical material excellent for use as a cavity insulation between wall, floor and ceiling framing members.
Energy-efficient foamboard sheathing panels are designed as an alternative to conventional plywood and softboard sheathing systems. The higher the R-Value, the greater the insulating power.
Proper ventilation is required to prevent the buildup of damaging moisture that is generated from normal household activities such as laundry, showers, dishwashing and cooking. Ventilation is also necessary to reduce attic temperatures to prevent premature roof aging and to improve energy efficiency.
* Double the above ratio for 1:150. Minimum based on HUD requirement MPS 403-3
NOFMA Hardware Flooring Must be installed over a proper subfloor. T&G must be blind nailed on the tongue edge along the length of the strip/plank and near the ends (1"-3") with face nailing required on starting runs (1-2) and finishing runs (2-4), Sq. edge must be face nailed. Inadequate nailing contributes to cracks and noisy floors by allowing movement of the floor.