• Structural framing study of a typical bay (~30' x ~50')
• For each structural framing material/system:
- Pros and Cons
- Relative pricing
- Relative embodied CO2 impact
Umatilla Police Station Project Number: 2220303.00 May
Option 1 - Redbuilt Roof Trusses w/ Wood Roof
• Trusses comprised of wood chords with tube steel webs
• Trusses spaced @ 5'-0" on center
• Plywood roof with subpurlins between trusses
• Wood stud bearing walls
WOOD BEARING SHEAR WALLS, TYP
Option 2 - Open Web Steel Joists w/ Metal Roof Deck
• Standard open web steel joists
• Trusses spaced @ ~7'-0"
• Metal roof deck
• Steel tube columns at grid intersections
STEEL TUBE COLUMNS WHERE OCCURS
JOIST GIRDERS WHERE OCCURS
• Stacked wide flange framing at clerestory METAL STUD WITH WOOD SHEATHING
STACKED WIDE FLANGE BEAMS AT CLERESTORY GRID
METAL STUD WITH WOOD SHEATHING INFILL SHEAR WALLS BETWEEN CLERESTORY WHERE OCCURS
Option 3 - Open Web Steel Joists w/ Wood Roof
• Standard open web steel joists
• Trusses spaced @ 10'-0"
• Plywood roof with subpurlins between trusses
• Steel tube columns at grid intersections
• Stacked wide flange framing at clerestory
PLYWOOD SHEATHING
STEEL TUBE COLUMNS WHERE OCCURS 2x6 SUBPURLINS @ 2' OC
JOIST GIRDERS WHERE OCCURS
WOOD OR METAL STUD WITH WOOD SHEATING NON-BEARING SHEAR WALLS, TYP
WOOD OR METAL STUD WITH WOOD SHEATHING INFILL SHEAR WALLS BETWEEN CLERESTORY WHERE OCCURS STACKED WIDE FLANGE BEAMS AT CLERESTORY GRID
Option 4 - Glulam Framing w/ Wood Roof
• Glulam beams/girders
• Beams spaced @ ~8'-0"
• Plywood roof with subpurlins between beams
• Steel tube columns as occurs
• Wood posts within wood sheathed walls at glulam beams
POSTS WITHIN SHEAR WALL AT GLULAM BEAMS
STEEL TUBE COLUMNS WHERE OCCURS
GLB5-1/8x31-1/2
GLB3-1/2x16
GLB3-1/2x16
WOOD NON-BEARING SHEAR WALLS, TYP
8x6 POSTS WITHIN INTERIOR SHEAR WALL AT GLULAM BEAMS
6x6
2x6 SUBPURLINS @ 2' OC
PLYWOOD SHEATHING
Option 5 - Glulam Framing w/ CLT Roof
• Glulam beams between bearing walls
• Cross Laminated Timber (CLT) roof deck
• Wood stud bearing walls
• Steel tube columns as occurs
175E CLT PANELS, TYP
WOOD BEARING SHEAR WALLS, TYP
STEEL TUBE COLUMNS WHERE OCCURS
Option 6 - Glulam Framing w/ T&G Deck
• Glulam beams/girders
• Beams spaced @ ~8'-0"
• Tongue & Groove (T&G) roof decking w/ plywood sheathing
• Steel tube columns as occurs
• Wood posts within wood sheathed walls at glulam beams
6x6 POSTS WITHIN SHEAR WALL AT GLULAM BEAMS
PLYWOOD SHEATHING
2x4 T&G DECKING
STEEL TUBE COLUMNS WHERE OCCURS
GLB5-1/8x33
GLB3-1/2x16
GLB3-1/2x16
WOOD NON-BEARING SHEAR WALLS, TYP
8x6 POSTS WITHIN INTERIOR SHEAR WALL AT GLULAM BEAMS
