The Wind and Seismic Bracing Calculator

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Please choose or enter all items indicated in *.

• Location*
• Select a location 100 Mile House, BC Abbotsford, BC Agassiz, BC Alberni, BC Ashcroft, BC Bamfield, BC Beatton River, BC Bella Bella, BC Bella Coola, BC Burns Lake, BC Cache Creek, BC Campbell River, BC Carmi, BC Castlegar, BC Chetwynd, BC Chilliwack, BC Comox, BC Courtenay, BC Cranbrook, BC Crescent Valley, BC Crofton, BC Dawson Creek, BC Dease Lake, BC Dog Creek, BC Duncan, BC Elko, BC Fernie, BC Fort Nelson, BC Fort St. John, BC Glacier, BC Gold River, BC Golden, BC Grand Forks, BC Greenwood, BC Hope, BC Jordan River, BC Kamloops, BC Kaslo, BC Kelowna, BC Kimberley, BC Kitimat Plant, BC Kitimat Townsite, BC Ladysmith, BC Langford, BC Lillooet, BC Lytton, BC Mackenzie, BC Masset, BC McBride, BC McLeod Lake, BC Merritt, BC Mission City, BC Montrose, BC Nakusp, BC Nanaimo, BC Nelson, BC Ocean Falls, BC Osoyoos, BC Parksville, BC Penticton, BC Port Alberni, BC Port Alice, BC Port Hardy, BC Port McNeill, BC Port Renfrew, BC Powell River, BC Prince George, BC Prince Rupert, BC Princeton, BC Qualicum Beach, BC Queen-Charlotte City, BC Quesnel, BC Revelstoke, BC Salmon Arm, BC Sandspit, BC Sechelt, BC Sidney, BC Smith River, BC Smithers, BC Sooke, BC Squamish, BC Stewart, BC Tahsis, BC Taylor, BC Terrace, BC Tofino, BC Trail, BC Ucluelet, BC Burnaby (Simon Fraser Univ.), BC Cloverdale, BC Haney, BC Ladner, BC Langley, BC New Westminster, BC North Vancouver, BC Richmond, BC Surrey (88 Ave & 156 St.), BC Vancouver (City Hall), BC Vancouver (Granville & 41 Ave), BC West Vancouver, BC Vernon, BC Victoria, BC Victoria (Gonzales Hts), BC Victoria (Mt Tolmie), BC Whistler, BC White Rock, BC Williams Lake, BC Youbou, BC Athabasca, AB Banff, AB Barrhead, AB Beaverlodge, AB Brooks, AB Calgary, AB Campsie, AB Camrose, AB Canmore, AB Cardston, AB Claresholm, AB Cold Lake, AB Coleman, AB Coronation, AB Cowley, AB Drumheller, AB Edmonton, AB Edson, AB Embarras Portage, AB Fairview, AB Fort MacLeod, AB Fort McMurray, AB Fort Saskatchewan, AB Fort Vermilion, AB Grande Prairie, AB Habay, AB Hardisty, AB High River, AB Hinton, AB Jasper, AB Keg River, AB Lac la Biche, AB Lacombe, AB Lethbridge, AB Manning, AB Medicine Hat, AB Peace River, AB Pincher Creek, AB Ranfurly, AB Red Deer, AB Rocky Mountain House, AB Slave Lake, AB Stettler, AB Stony Plain, AB Suffield, AB Taber, AB Turner Valley, AB Valleyview, AB Vegreville, AB Vermilion, AB Wagner, AB Wainwright, AB Wetaskiwin, AB Whitecourt, AB Wimborne, AB Assiniboia, SK Battrum, SK Biggar, SK Broadview, SK Dafoe, SK Dundurn, SK Estevan, SK Hudson Bay, SK Humboldt, SK Island Falls, SK Kamsack, SK Kindersley, SK Lloydminster, SK Maple Creek, SK Meadow Lake, SK Melfort, SK Melville, SK Moose Jaw, SK Nipawin, SK North Battleford, SK Prince Albert, SK Qu’Appelle, SK Regina, SK Rosetown, SK Saskatoon, SK Scott, SK Strasbourg, SK Swift Current, SK Uranium City, SK Weyburn, SK Yorkton, SK Beausejour, MB Boissevain, MB Brandon, MB Churchill, MB Dauphin, MB Flin Flon, MB Gimli, MB Island Lake, MB Lac du Bonnet, MB Lynn Lake, MB Morden, MB Neepawa, MB Pine Falls, MB Portage la Prairie, MB Rivers, MB Sandilands, MB Selkirk, MB Split Lake, MB Steinbach, MB Swan River, MB The Pas, MB Thompson, MB Virden, MB Winnipeg, MB Ailsa Craig, ON Ajax, ON Alexandria, ON Alliston, ON Almonte, ON Armstrong, ON Arnprior, ON Atikokan, ON Attawapiskat, ON Aurora, ON Bancroft, ON Barrie, ON Barriefield, ON Beaverton, ON Belleville, ON Belmont, ON Newcastle (Bowmanville), ON Bracebridge, ON Bradford, ON Brampton, ON Brantford, ON Brighton, ON Brockville, ON Burk’s Falls, ON Burlington, ON Cambridge, ON Campbellford, ON Cannington, ON Carleton Place, ON Cavan, ON Centralia, ON CFB Borden, ON Chapleau, ON Chatham, ON Chesley, ON Clinton, ON Coboconk, ON Cobourg, ON Cochrane, ON Colborne, ON Collingwood, ON Cornwall, ON Corunna, ON Deep River, ON Deseronto, ON Dorchester, ON Dorion, ON Dresden, ON Dryden, ON Dundalk, ON Dunnville, ON Durham, ON Dutton, ON Earlton, ON Edison, ON Elliot Lake, ON Elmvale, ON Embro, ON Englehart, ON Espanola, ON Exeter, ON Fenelon Falls, ON Fergus, ON Forest, ON Fort Erie, ON Fort Erie (Ridgeway), ON Fort Frances, ON Gananoque, ON Geraldton, ON Glencoe, ON Goderich, ON Gore Bay, ON Graham, ON Gravenhurst (Muskoka Airport), ON Grimsby, ON Guelph, ON Guthrie, ON Haileybury, ON Haldimand (Caledonia), ON Haldimand (Hagersville), ON Haliburton, ON Halton Hills (Georgetown), ON Hamilton, ON Hanover, ON Hastings, ON Hawkesbury, ON Hearst, ON Honey Harbour, ON Hornepayne, ON Huntsville, ON Ingersoll, ON Iroquois Falls, ON Jellicoe, ON Kapuskasing, ON Kemptville, ON Kenora, ON Killaloe, ON Kincardine, ON Kingston, ON Kinmount, ON Kirkland Lake, ON Kitchener, ON Kitchenuhmay-koosib (Big Trout Lake), ON Lakefield, ON Lansdowne House, ON Leamington, ON Lindsay, ON Lion’s Head, ON Listowel, ON London, ON Lucan, ON Maitland, ON Markdale, ON Markham, ON Martin, ON Matheson, ON Mattawa, ON Midland, ON Milton, ON Milverton, ON Minden, ON Mississauga, ON Mississauga (Port Credit), ON Mitchell, ON Moosonee, ON Morrisburg, ON Mount Forest, ON Nakina, ON Nanticoke (Jarvis), ON Nanticoke (Port Dover), ON Napanee, ON New Liskeard, ON Newcastle, ON Newmarket, ON Niagara Falls, ON North Bay, ON Norwood, ON Oakville, ON Orangeville, ON Orillia, ON Oshawa, ON Ottawa (Barrhaven), ON Ottawa (City Hall), ON Ottawa (Kanata), ON Ottawa (M-C Int’l Airport), ON Ottawa (Orleans), ON Owen Sound, ON Pagwa River, ON Paris, ON Parkhill, ON Parry Sound, ON Pelham (Fonthill), ON Pembroke, ON Penetanguishene, ON Perth, ON Petawawa, ON Peterborough, ON Petrolia, ON Pickering (Dunbarton), ON Picton, ON Plattsville, ON Point Alexander, ON Port Burwell, ON Port Colborne, ON Port Elgin, ON Port Hope, ON Port Perry, ON Port Stanley, ON Prescott, ON Princeton, ON Raith, ON Rayside-Balfour (Chelmsford), ON Red Lake, ON Renfrew, ON Richmond Hill, ON Rockland, ON Sarnia, ON Sault Ste. Marie, ON Schreiber, ON Seaforth, ON Shelburne, ON Simcoe, ON Sioux Lookout, ON Smiths Falls, ON Smithville, ON Smooth Rock Falls, ON South River, ON Southampton, ON St. Catharines, ON St. Mary’s, ON St. Thomas, ON Stirling, ON Stratford, ON Strathroy, ON Sturgeon Falls, ON Sudbury, ON Sundridge, ON Tavistock, ON Temagami, ON Thamesford, ON Thedford, ON Thunder Bay, ON Tillsonburg, ON Timmins, ON Timmins (Porcupine), ON Etobicoke, ON North York, ON Scarborough, ON Toronto (City Hall), ON Mississauga (Lester B. Pearson Int’l Airport), ON Trenton, ON Trout Creek, ON Uxbridge, ON Vaughan (Woodbridge), ON Vittoria, ON Walkerton, ON Wallaceburg, ON Waterloo, ON Watford, ON Wawa, ON Welland, ON West Lorne, ON Whitby, ON Whitby (Brooklin), ON White River, ON Wiarton, ON Windsor, ON Wingham, ON Woodstock, ON Wyoming, ON Acton-Vale, QC Alma, QC Amos, QC Aylmer, QC Baie-Comeau, QC Baie-Saint-Paul, QC Beauport, QC Bedford, QC Beloeil, QC Brome, QC Brossard, QC Buckingham, QC Campbell’s Bay, QC Chambly, QC Coaticook, QC Contrecoeur, QC Cowansville, QC Deux-Montagnes, QC Dolbeau, QC Drummondville, QC Farnham, QC Fort-Coulonge, QC Gagnon, QC Gaspé, QC Gatineau, QC Gracefield, QC Granby, QC Harrington-Harbour, QC Havre-St-Pierre, QC Hemmingford, QC Hull, QC Iberville, QC Inukjuak, QC Joliette, QC Kuujjuaq, QC Kuujjuarapik, QC La Pocatière, QC Lachute, QC Lac-Mégantic, QC La-Malbaie, QC La-Tuque, QC Lennoxville, QC Léry, QC Loretteville, QC Louiseville, QC Magog, QC Malartic, QC Maniwaki, QC Masson, QC Matane, QC Mont-Joli, QC Mont-Laurier, QC Montmagny, QC Beaconsfield, QC Dorval, QC Laval, QC Montréal (City Hall), QC Montréal-Est, QC Montréal-Nord, QC Outremont, QC Pierrefonds, QC St-Lambert, QC St-Laurent, QC Ste-Anne-de-Bellevue, QC Verdun, QC Nicolet (Gentilly), QC Nitchequon, QC Noranda, QC Percé, QC Pincourt, QC Plessisville, QC Port-Cartier, QC Puvirnituq, QC Ancienne-Lorette, QC Lévis, QC Québec, QC Sillery, QC Ste-Foy, QC Richmond, QC Rimouski, QC Rivière-du-Loup, QC Roberval, QC Rock-Island, QC Rosemère, QC Rouyn, QC Saguenay, QC Saguenay (Bagotville), QC Saguenay (Jonquière), QC Saguenay (Kenogami), QC Saint-Eustache, QC Saint-Jean-sur-Richelieu, QC Salaberry-de-Valleyfield, QC Schefferville, QC Senneterre, QC Sept-Îles, QC Shawinigan, QC Shawville, QC Sherbrooke, QC Sorel, QC Ste-Agathe-des-Monts, QC St-Félicien, QC St-Georges-de-Cacouna, QC St-Hubert, QC Saint-Hubert-de-Rivière-du-Loup, QC St-Hyacinthe, QC St-Jérôme, QC St-Jovite, QC St-Lazare-Hudson, QC St-Nicolas, QC Sutton, QC Tadoussac, QC Témiscaming, QC Terrebonne, QC Thetford Mines, QC Thurso, QC Trois-Rivières, QC Val-des-Sources, QC Val-d’Or, QC Varennes, QC Verchères, QC Victoriaville, QC Ville-Marie, QC Wakefield, QC Waterloo, QC Windsor, QC Alma, NB Bathurst, NB Boiestown, NB Campbellton, NB Edmundston, NB Fredericton, NB Gagetown, NB Grand Falls, NB Miramichi, NB Moncton, NB Oromocto, NB Sackville, NB Saint Andrews, NB Saint George, NB Saint John, NB Shippagan, NB St. Stephen, NB Woodstock, NB Amherst, NS Antigonish, NS Bridgewater, NS Canso, NS Dartmouth, NS Debert, NS Digby, NS Greenwood (CFB), NS Halifax, NS Kentville, NS Liverpool, NS Lockeport, NS Louisburg, NS Lunenburg, NS New Glasgow, NS North Sydney, NS Pictou, NS Port Hawkesbury, NS Springhill, NS Stewiacke, NS Sydney, NS Tatamagouche, NS Truro, NS Wolfville, NS Yarmouth, NS Charlottetown, PE Souris, PE Summerside, PE Tignish, PE Argentia, NL Bonavista, NL Buchans, NL Cape Harrison, NL Cape Race, NL Channel-Port aux Basques, NL Corner Brook, NL Gander, NL Grand Bank, NL Grand Falls, NL Happy Valley-Goose Bay, NL Labrador City, NL St. Anthony, NL St. John’s, NL Stephenville, NL Twin Falls, NL Wabana, NL Wabush, NL Aishihik, YT Dawson, YT Destruction Bay, YT Faro, YT Haines Junction, YT Snag, YT Teslin, YT Watson Lake, YT Whitehorse, YT Aklavik, NT Echo Bay / Port Radium, NT Fort Good Hope, NT Fort McPherson, NT Fort Providence, NT Fort Resolution, NT Fort Simpson, NT Fort Smith, NT Hay River, NT Inuvik, NT Mould Bay, NT Norman Wells, NT Rae-Edzo, NT Tungsten, NT Ulukhaqtuuq/Holman, NT Wrigley, NT Yellowknife, NT Alert, NU Arctic Bay, NU Arviat, NU Baker Lake, NU Eureka, NU Igluligaarjuk/ Chesterfield Inlet, NU Iqaluit, NU Iqaluktuuttiaq/ Cambridge Bay, NU Isachsen, NU Kangiqiniq / Rankin Inlet , NU Kanngiqtugaapik / Clyde River, NU Kugluktuk / Coppermine, NU Nottingham Island, NU Resolute, NU Resolution Island, NU Salliq / Coral Harbour, NU Other Custom Location
  Please select a location or enter a custom location.

• 1 in 500 year hourly wind pressure (in kPa)*
• (Select the location, first) Enter a custom value → HWP Custom Value
  Enter a number for 1 in 500 year hourly wind pressure or choose the default value from the dropdown.

  As per NBC 9.23.13.9, HWP shall not be greater than 1.2 kPa.

• Reference hourly wind pressure (in kPa)

• Site Class
• Select one A B C D E Unknown (Max of Site Class A through E only)

• Basic snow load roof factor (C_b)*
• Select one 0.55 0.45
  Select a basic snow load roof factor (C_b).

• 1 in 1000 year ground snow load (S_s) (in kPa)*
• (Select the location, first) Enter a custom value → S_s Custom Value
  Enter a number for 1 in 50 ground snow load (Ss) or choose the default value from the dropdown.

• 1 in 1000 year rain load (S_r) (in kPa)*
• (Select the location, first) Enter a custom value → S_r Custom Value
  Enter a number for 1 in 50 rain load (S_r) or choose the default value from the dropdown.

• Specified Snow Load (in kPa)*
• (Enter the Cb, Ss, and Sr, first) Enter a custom value → Snow Custom Value
  Enter a number for Specified Snow Load or choose the default value from the dropdown.

• S_max*
• (Select the location, first) Enter a custom value → S_max Custom Value
  Enter a number for S_max or choose the default value from the dropdown.

  As per NBC 9.23.13.9, Smax for Site Class C shall not be greater than 2.6.

  As per NBC 9.23.13.3, braced wall bands cannot be designed with NBC Part 9 for Extreme Wind and Seismic Forces. This is beyond the scope of this tool.