How does it work? The adjustable stair brackets are positioned on two 2x6’s -using a reusable spacing tool. The spacer is set using a chart which will give the exact setting for the rise and tread required for your project. Two screws are set in each bracket, attaching to the two 2x6’s. This forms a fully adjustable stringer which is then adjusted exactly to your stair requirements. Fixing screws are then inserted to lock the brackets in position. Two to three cuts total, top and bottom completes the stringer. Compared this to the dozens of cuts required for traditional construction. With this system, stairs can be built up to nine feet wide, using only the two outside stringers....no interior stringers required.
Choosing the right parts to incorporate into your stair’s design is a very critical decision to make. Everything should be chosen based on safety, function, and visual appeal. Safety is ensured when there are no sharp edges or abrasive surfaces found in the parts to be used. Function is dictated by how well the parts fit together, with no loose baluster or wobbly stair rails. The visual appeal is how the parts when incorporated into a single design will look. The resulting stairs should be coherent to the space where the stairs are installed. Its impact is seen on how well it blends with the existing furnishings or how it compliments the space’s design elements.
Other codes address "rail post support" safety. A rail post per code regulations is required to support a lateral load of 200 lbs. This is a poorly enforced area of the code and with many inspectors content with the bump test. If it doesn’t move too much when they bump it with their hip, the rail will pass inspection. Many rail posts are simply lagged or nailed to the rim joists and post which are mounted directly to the deck surface will simply not meet code. The tragedy is, there are systems available on the market that correctly address this problem. Simpson, USP and Deck-Loc have brackets which will meet code for rim joist attachment but there’s only one adjustable bracket system (discussed below) which will meet code for wood or composite stairs.
Attention is now being given to the ability of the vertical post’s strength when hit by various degrees of lateral thrust pressure. These new directives, requiring the vertical rail post to support a minimum of 200 lbs. of lateral thrust, is making engineered stair systems extremely popular, with their ability to withstand over 500 lbs of lateral thrust for the ’rail post support’ structural sections of the overall decking plans.
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