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You’ve been thinking about stringers all wrong

Apparently stair stringers are superfluous, and their importance is overrated.

I would not want to be nearby if a 300-pound man were to go up that stair.
 
tmurray said:
SERIOUSLY?
Click to expand...
Kind of....Don't get me wrong, I would fail those, it's just not "easy"....And If I use it, I have to get engineering on all stairs....Sorta

R301.1 Application​

Diagram
Buildings and structures, and parts thereof, shall be constructed to safely support all loads, including dead loads, live loads, roof loads, flood loads, snow loads, wind loads and seismic loads as prescribed by this code. The construction of buildings and structures in accordance with the provisions of this code shall result in a system that provides a complete load path that meets the requirements for the transfer of loads from their point of origin through the load-resisting elements to the foundation. Buildings and structures constructed as prescribed by this code are deemed to comply with the requirements of this section.
R301.1.1 Alternative Provisions
As an alternative to the requirements in Section R301.1, the following standards are permitted subject to the limitations of this code and the limitations therein. Where engineered design is used in conjunction with these standards, the design shall comply with the International Building Code.
  1. AWC Wood Frame Construction Manual (WFCM).
  2. AISI Standard for Cold-Formed Steel Framing—Prescriptive Method for One- and Two-Family Dwellings (AISI S230).
  3. ICC Standard on the Design and Construction of Log Structures (ICC 400).

R301.1.3 Engineered Design​

Where a building of otherwise conventional construction contains structural elements exceeding the limits of Section R301 or otherwise not conforming to this code, these elements shall be designed in accordance with accepted engineering practice. The extent of such design need only demonstrate compliance of nonconventional elements with other applicable provisions and shall be compatible with the performance of the conventional framed system. Engineered design in accordance with the International Building Code is permitted for buildings and structures, and parts thereof, included in the scope of this code. Engineered design shall be certified by a registered design professional.
 
OK, let’s talk engineering. Assuming everything is as it initially appears, the front edge of the tread, where it joins the riser, would be considered at best a “hinge” connection and would collapse downward/inward.

If it’s real and functional and meets code, another design solution could be that the risers are actually 2x joists structurally cantilevered from the room on the other side of the wall. Some woodworker has way too much time and space on his hands for a great joke.
 
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