ARCH 2615-5615 Building Technology II: Structural Elements

Spring 2022

Jonathan Ochshorn

Assignment 2 solutions

Refer to Assignment 2 for geometry and other parameters.

For the framing plan and section shown below, assume the following:

Office occupancy with L = 50 psf. Consider live load reduction to determine the reduced live load.
Dead load (for floors and roof) = 23 psf.
Snow load = 55 psf.
Construction/maintenance roof live load, L_r = 30 psf.
Use Douglas Fir-Larch No. 2 for all beams, girders, and columns.
Design beams and girders with an allowable live load deflection of L/360 and an allowable total load deflection of L/240.

A. Using the online calculators for column governing loads, wood beams, and wood columns, design the following elements:

Typical beam.
Typical girder.
Columns (governing loads, 3rd-floor column).

Columns (design of 3rd-floor column).
Columns (governing loads, 1st-floor column).

Columns (design of 1st-floor column).

B. The beam can be designed without the calculator (pdf).