Final answer:
The vertical members of an I-joist are known as 4) flanges, which provide load-bearing capabilities. In a typical construction, studs, which are vertical members as well, are spaced 16.0 inches apart, equivalent to 40.64 centimeters in metric.
Step-by-step explanation:
The vertical members of an I-joist are called flanges. I-joists are engineered wood products that have gained popularity for their strength and consistency in floor and roof framing. They are composed of two horizontal members, known as flanges, connected by a vertical web. The flanges provide the main load-bearing capabilities, functioning similarly to the wide flanges of a steel I-beam. The I-joist's unique design allows them to span larger distances than traditional lumber without the same depth of material, which can save space and materials in construction.
To answer the secondary question regarding the conversion of distances from inches to centimeters, the 16.0 inches typically separating vertical studs would be equivalent to approximately 40.64 centimeters, since one inch is 2.54 centimeters.