Seating
Built-in benches must be planned during the design phase because they are often incorporated into the structural framing, with the posts serving as the vertical supports from which the bench supports are cantilevered.
A reasonable amount of surface area is required to attach the bench supports, and often the posts are sized as 6X6s or as independent 2X8 members extended up from the structural framing.
These structural members can be notched to support the bench slats, and ripped to 4 inches above the seating to support a backrest. The structure is banded with 2X4s with 2X6 cross members supporting the bench slats.
Railings
The design of deck railings can be very complex, such as those with ornate features such as turned balustrades and finials. Or, they can be designed as very simple and functional elements. The illustrations show a sample of options but the following provides some basic principles that should be followed regardless of the design.
Most local building codes regulate railing heights and maximum balustrade openings. Generally, a 42-inch railing height is required if the deck is greater than 18 inches above finished grade.
