Final answer:
For an I-Joist spanning 20 feet and designed to an L/480 standard, the floor is allowed to deflect up to 0.5 inch. Vertical studs are typically placed 16 inches apart, which is equivalent to 40.64 centimeters.
Step-by-step explanation:
If an I-Joist spans 20 feet (20') and is designed to an L/480 standard for floor deflection, then the amount of deflection allowed can be calculated by dividing the span length by 480. The term L refers to the span length of the joist. In this case, L is 20 feet, which is equivalent to 240 inches (since there are 12 inches in a foot).
Using the standard L/480 for deflection, we divide the span length in inches (240) by 480:
Deflection = 240 inches / 480 = 0.5 inch
Thus, for a 20-foot span I-Joist designed to the L/480 deflection standard, the floor is allowed to deflect up to 0.5 inch.
Regarding the conversion of distances in inches to centimeters: vertical studs are typically placed 16.0 inches apart. To convert this distance to centimeters, we use the conversion factor that one inch equals 2.54 centimeters.
16.0 inches x 2.54 cm/in = 40.64 centimeters
Therefore, the distance between vertical studs placed 16.0 inches apart is 40.64 centimeters.