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The typical deck railing is generally built from pressure treated lumber. [14] Posts on a deck are also typically pressure treated wood and standard sizes are 4x4, 6x6, and 8x8. These posts give structural support to the railing assembly and are the most critical part for the safety of the guard rail assembly. [15]
Typical railing assemblies must meet structural strength requirements of 9.6 kPa (200 lbf/sq ft). In short, decks are complex load-bearing structures that most often require structural engineering, plans, and permits. Residential decks may contain spaces for cooking and seating.
Due to the excessive load requirements [2] of this type of railing system, post construction is critical to the success of cable railings.. Cable railing requires very rigid frames compared to many other types of railings due to the forces applied to the end posts by tensioning the cables.
An example of a common residential guard rail (US) handrail (Brit.) is a wood railing around a deck or patio. In the US this is typically built on-site from pressure treated lumber thus featuring a simplistic design of vertical baluster spaced every 3.5 inches (8.9 cm) demonstrating compliance with Building Codes (Standards).
The deck is the roadway or walkway surface. In roadway applications it is usually a poured reinforced concrete slab, but can also be a steel grid or wood plank. The deck includes any road lanes, medians, sidewalks, parapets or railings, and miscellaneous items like drainage and lighting.
Railings are often present on both sides of stairs, but can sometimes be only on one side or absent altogether. On wide staircases, there can be one or more railings between the two sides. The term "banister" is sometimes used to mean just the handrail, sometimes the handrail and the balusters, or sometimes just the balusters.
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