What size wood beam will span 12 feet? A double 2x12 beam could potentially span 12 feet, but this also depends on the load it needs to carry. For 2圆 rafters, this would be around 5.5 inches. What is the minimum distance between two rafters? The minimum distance is typically the width of the lumber used for the rafters. How far can a double 2x8 beam span without support? Around 10 to 14 feet. Larger spans and heavier loads require larger rafters. How big do my rafters need to be? The size of the rafters depends on the span, the load they'll carry, the species of wood, and local building codes. Generally, 2x8 to 2x10 are common choices. What size lumber to use for roof rafters? The size of lumber depends on factors like span, load, and local building codes. Should I use 2x4 or 2圆 for rafters? For rafters, especially if they're spanning any significant distance, 2圆 would be a better choice for added strength and load-bearing capacity. What size rafters do I need for a 16 foot span? 2x10 or larger would be appropriate for a 16-foot span. Should I use 2x8 or 2圆 rafters? 2x8 would be more suitable for longer spans and heavier loads compared to 2圆. You might need additional support or larger lumber for that span. How far can a 4X10 rafter span? About 18 to 24 feet.Ĭan a 2圆 rafter span 12 feet? It's on the edge of the recommended span. How far can 2x10 rafters span? Roughly 15 to 20 feet. How far can a 2x8 span for a rafter? Approximately 12 to 16 feet. How far can a 2圆 rafter span without support? Around 9 to 12 feet. Timber Rafter Size Calculator Span (in feet): Total Load (in pounds): Calculate
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