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Stair Structures

Between the footings and steps of a stair systems is the nearly-invisible structure. The structure supports the steps and landings (platforms that break up long runs of stairs or change the stair direction). DRS builds strong, durable structures that reflect the particular slope of each property and comply with or exceed Michigan building code.

Stringers support the steps and connect to the footings. Full or "uncut" stringers are on the outer sides of a staircase and hide the edges of the steps; cut or "sawtooth" stringers may also be used on the outer edges and are used to support the treads. DRS uses a tough sealant on cut stringers to increase their longevity.

Joists serve the same purpose as stringers but are used for landings and decks. We also coat the top edge of joists to reduce moisture-related degradation of the structure.

Risers are the vertical boards between steps. Although EGLE (Michigan's environmental division) does not recommend risers on dune stairs because they limit light for vegetation growing below, the Michigan building code requires risers large enough to prevent more than a 4" space around them.

DRS designed these stairs with cut stringers and full risers to show off the ipe hardwood treads (Grand Beach MI).

For these treated-lumber stairs, DRS used two full outer stringers and three cut inner stringers to maximize support; this client selected open risers to encourage plant growth on the dune (New Buffalo MI).

This system of treated-lumber stairs has full outer stringers with three hidden cut stringers. The partial risers allow sand and water to pass through while maximizing safety (Covert MI).

This "mono-stringer" or floating staircase features a single, central support beam; DRS designed the 6" thick concrete steps to reflect the look of partial risers (Grand Beach MI)

This removeable aluminum stair system over a rock revetment uses two full stringers and open risers (Benton Harbor MI).

DRS designed a steel frame to support removeable aluminum stairs, which greatly strengthens the stairs and lengthens their lifespan (Fennville MI)

"DRS came up with a very unique solution for us. They engineered, installed, and currently maintain a steel and wooden stair systems over our stone revetment so that we have safe lake access. It's amazing. The steel framework supports have survived three icy winters so far."
-- Bill, Stevensville

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