When your engineer asks you for your estimated design loads because you know drafting and did a 3D model of your dream home. 

• Residential minimum design requirements
  • Site Plan
  • Floors
  • Foundation and Roof Plans
  • Elevations and Building Sections (minimum two building sections)
  • Building Details
  • Plumbing Plan (water supply line sizes, gas supply line sizes, water-heating equipment, hot water recirculation pump controls, fixture flow and flush rates)
  • Mechanical Plan (equipment type/size, supply/return, outside air ventilation, exhaust fan systems)
  • Electrical Plan (lighting, power, load calculation, single line diagram)
  • Plans must be readable and to "scale".
  • Place all required notes on the drawings.
  • Specification books on Single Family Plan checks are not acceptable
  • Provide a True North Arrow and an Orientation North Arrow on site plans and floor plans.
  • Exits and Emergency Escapes
  • Light, Ventilation and Sanitation
  • Yards and Courts
  • Sanitation
  • Room Dimensions
  • Smoke Detectors
  • Heating
  • Attached Garages
  • Attached Carports
  • Stairways And Landings
  • Handrails
  • Detached Garages And Accessory Buildings

Workshop Categories (MATH Help): 

Calculating Structure weights and loads 

Weights of Building Materials

• Roofing
  • Wood shingles = 3.0 psf
  • Asphalt shingles = 2.5 psf
  • Wood shakes = 6.0 psf
  • Clay tile = 9.0 to 14.0 psf
• Materials
  • 5/8" plywood = 1.8 psf
  • 3/4" plywood = 2.3 psf
  • 1 1/8" plywood = 3.4 psf
  • 2" (nom.) decking = 4.3 psf
  • 1" (nom.) hardwood floor = 4.0 psf
  • Linoleum = 1.5 psf
  • 3/4" ceramic tile or quarry tile = 10.0 psf
  • 3/4" gypcrete = 6.5 psf
  • 1/2" gypsum board = 2.2 psf
  • 5/8" gypsum board = 2.8 psf
  • Plaster (1" thick) = 8.0 psf
  • Acoustical tile = 1.0 psf
  • 1" Cement plaster = 12.0 psf
  • 1" Rigid fiberglass = 1.5 psf
  • 1" Glass wool = 0.3 psf

Douglas Fir Members
Weights In Pounds Per Square Foot