Tailor their length to your training system, leaving canes from 4 to 7 feet long. Prune everbearing red and yellow raspberries such as 'Fall Gold' and 'Heritage' the same as summerbearing types until this third step. Everbearing raspberries fruit again in summer farther down their canes. Instead of shortening the canes to a convenient trellis height, shorten them to just below where they stopped fruiting the previous fall. This stimulates growth of side branches that produce fruit the next season.
Height is a matter of neatness and manageability.
Pinch lower if you have no trellis, higher for trellis-trained plants. Just before growth resumes in spring, remove damaged, diseased, or spindly canes. Leave the thickest ones longest. In the canes' first summer and first fall, fruits grow at the tops of new shoots. Early in the second season, fruits are borne low on last year's canes.