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Design Load Formula:
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Design Load is the total load that a deck structure must be designed to support, consisting of Dead Load (the weight of the structure itself) and Live Load (the weight of people, furniture, and other temporary loads).
The calculator uses the design load formula:
Where:
Explanation: The equation calculates the total load that a deck must support, combining both permanent and temporary loads for structural design purposes.
Details: Accurate design load calculation is crucial for ensuring deck safety, structural integrity, and compliance with building codes. Proper calculation prevents overloading and potential structural failure.
Tips: Enter dead load and live load values in pounds per square foot (psf). Both values must be non-negative numbers. Typical deck live loads range from 40-60 psf for residential decks.
Q1: What is included in dead load?
A: Dead load includes the weight of the deck structure itself - decking boards, joists, beams, posts, railings, and any permanent attachments.
Q2: What is included in live load?
A: Live load includes temporary loads such as people, furniture, planters, snow accumulation, and any other non-permanent items on the deck.
Q3: What are typical live load values for decks?
A: Residential decks typically require 40-60 psf live load capacity, while commercial decks may require higher values up to 100 psf depending on local building codes.
Q4: How do I determine the dead load of my deck?
A: Calculate the weight of all materials used in the deck construction, divided by the deck area. Material weights can typically be found in manufacturer specifications or building material references.
Q5: Should safety factors be applied to these calculations?
A: Yes, building codes typically require applying safety factors to design loads. This calculator provides the total nominal load - appropriate safety factors should be applied according to local building codes.