JoistPy is a library that acts as a database for SJI steel open web bar joist shapes for easy use in structural calculations.
Install using pip:
pip install joistpy
To use the joistpy library, first import the module
from joistpy import sjiThe library includes all standard K-, and KCS-Series joist designations. To access the K-Series joists use dot notation for the group of designations.
sji.K_SeriesThe KCS-Series joists can be accessed in a similar fashion.
From there specific designations can be obtained in a similar manner. Note that the prefix 'K_' or 'KCS_', as applicable, must be added to the joist designation in order to properly access it via dot notation.
k_joist = sji.K_Series.K_8K1
kcs_joist = sji.KCS_Series.KCS_14KCS1Properties can be obtained in a similar manner. Properties that can be accessed include approximate weight in plf and load tables for L/360 deflection criteria and Total Safe Load. Span values are in ft and load table values are in plf. Shear capacity in lbs can also be accessed for KCS joists.
weight = k_joist.weight
l360 = k_joist.l_360
total = k_joist.total
shear_capacity = kcs_joist.shear_capacityAdditonal properties can be calculated by using the Designation class methods.
span = 17.5 # joist span in ft
area = joist.get_eq_area() # equivalent cross-sectional are in in^2
mom_inertia = joist.get_mom_inertia(span) # moment of inertia in in^4
wl360 = joist.get_wl360(span) # load that produced L/360 deflection for the span in plf