Rebar & Reinforcement
ASTM A615 bar sizes, grade/yield strength, minimum concrete cover, and standard hook bend diameters.
Open Rebar & Reinforcement →— Civil Reference Material
Structural Steel Shapes
AISC dimensions and section properties for every W, M, S, HP, C, MC, angle, WT, HSS and pipe shape, plus designations and steel grades.
Open Structural Steel Shapes →Design Loads
ASCE 7 minimum live loads by occupancy, typical dead load estimates, ASD/LRFD load combinations, and wind exposure categories.
Open Design Loads →Lumber & Wood
Dressed lumber sizes and section properties, NDS reference design values by species and grade, and the CF, CD, CM and Cr adjustment factors.
Open Lumber & Wood →Soil Properties
Friction angle and unit weight by USCS group, IBC presumptive bearing values, concrete-on-soil friction, and API pile design parameters.
Open Soil Properties →Earthwork & Material Weights
Caterpillar load factors with swell, compacted soil unit weights, and densities of common construction materials.
Open Earthwork & Material Weights →Hydrology & Open Channel
Rational-method runoff coefficients, NRCS curve numbers, Manning’s n, and standard RCP diameters.
Open Hydrology & Open Channel →Highway Geometric Design
AASHTO stopping sight distance, side friction, minimum curve radius by superelevation, and crest and sag K values.
Open Highway Geometric Design →Concrete (ACI 318)
ACI 318-25 f′c limits, modulus, exposure classes and requirements, air content, development and splice lengths, hooks and bar spacing.
Open Concrete (ACI 318) →