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Maximum sizes of ducts or pipes through K series joists.
Maximum duct and pipe sizes through steel joists of K type:
K series are common open web joists, standard sized for typical applications. K types span from 8’ to 60’ across with depths of 8” to 30”.
Deflection and stress, moment of inertia, section modulus and technical information of beams and columns.
Heating, ventilation and air conditioning systems - design and dimensions.
Required duct area vs. air flow.
Standard size of circular ventilation air ducts.
Calculate velocities in circular and rectangular ducts - imperial and SI-units - online calculator.
Rectangular equivalent diameter for air flows between
100 - 50000 cfm.
No. 1 and No. 2 Grade of Douglas fir and maximum span floor joists - imperial units
Commonly used metric dimensions for rectangular air ducts in ventilation systems.
Standard dimensions of spiral ducts - Imperial units.
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