Materials:<\/strong><\/p>\n\n\n\n Top\/ Bottom Chord<\/em><\/p>\n\n\n\n Web sizes<\/em><\/p>\n\n\n\n Bottom chords<\/em><\/p>\n\n\n\n Top Chords<\/p>\n\n\n\n Web Sizes<\/em><\/p>\n\n\n\n Top\/ Bottom chords<\/p>\n\n\n\n Web Sizes<\/em><\/p>\n\n\n\n Cuts at warnervale generally as per the database. Double cuts to webs are fine as cutting time on Hundegger Saw is not a delay and the nesting of double cut joints gives smaller nail plate sizes and cheaper trusses.<\/p>\n\n\n\n Concrete Tile\/ Heavy Roof<\/p>\n\n\n\n Sheet Roof<\/p>\n\n\n\n Valley trusses<\/p>\n\n\n\n **Please note that the engineering and quote override these defaults. Refer to the engineering documentation for truss spacing details. **<\/em><\/p>\n\n\n\n Trusses are generally designed using N2 as a minimum for tie down design.<\/p>\n\n\n\n Loads as architectural or engineers plans require. Assumed 52kg\/m2 for concrete tile or 5.6kg\/m2, 0.48mm for metal sheet when loads are not specified.<\/p>\n\n\n\n NSW – Where ceilings are not specified it is assumed 10mm plasterboard direct bottom chord fixed to truss where trusses are 600c\u2019s.<\/p>\n\n\n\n All trusses are 600c\u2019s unless requested by builder and quoted otherwise. Check quote even when engineer says 900 NSW still often designs 600c\u2019s<\/p>\n\n\n\n No special additional truss spacing is allowed for unless noted on plan or by builder for:<\/p>\n\n\n\n Builder must specify where truss spacing doesn\u2019t accommodate additional roof penetrations.<\/p>\n\n\n\n All girder Stations are 2400 unless design requires otherwise.<\/p>\n\n\n\n Spans =<4800 \u2013 TG will be located to suit best design. Apex girders may be used depending on additional creepers or trusses added within the run.<\/p>\n\n\n\n In some cases the length of the truss run may alter the station location to suit better spacing designs.<\/p>\n\n\n\n Truncated girders or girders may be located parallel to beams or in a direction to reduce loads to beams.<\/p>\n\n\n\n For T-Bars a maximum 2400 parallel station is used to keep roof load width to 2400 max.<\/p>\n\n\n\n Stations greater than 2400 are used only where the design requires such as low pitch and long spans or significant cost savings can be made. (Insert height\/span general ratio here)<\/p>\n\n\n\n Only load walls that have been nominated on engineering unless specific allowances are made in the client specification.<\/p>\n\n\n\n Standard truss Internal supports to have a web to support. Some short span jacks and creepers up to 2400 may be designed to omit the web only in some cases.<\/p>\n\n\n\n Tip: In cases where a loadbearing wall has not been nominated by the engineering, but a loadbearing wall is required, check that the slab has been designed to carry a loadbearing wall in that section. We can then make that wall loadbearing if we run it past the client and the client confirms that they are happy with the change.<\/em><\/p>\n\n\n\n Structural fascia is applied to hip ends where overhangs are >610 or as the design requires such as cantilevers.<\/p>\n\n\n\n Structural fascia is not setback in NSW from the standard overhang dimension.<\/p>\n\n\n\n Overhang < 150mm: Standard truss with blocking to form the rest.<\/p>\n\n\n\n Overhang => 150mm: Sprockets\/outriggers to be designed & supplied.<\/p>\n\n\n\n Gable end trusses are set-down type ends unless the design requires otherwise. Z-sprockets are not preferred unless specified by builder due to difficult installation.<\/p>\n\n\n\n Sizing as per plan.<\/p>\n\n\n\n Vertical end webs to form vertical ends and size as per design.<\/p>\n\n\n\n No additional loads are applied by default – Additional loads are only applied when noted on plan or specified by the builder including loads for solar panels, hot water units, and A\/C units.<\/p>\n\n\n\n A\/C Units are supported from top chords in NSW. NO loads are applied to bottom chords as per A\/C install guidelines to prevent ceiling vibration noise.<\/p>\n\n\n\n Space to hang the unit is left as minimum 1500wide x 1800(3 trusses) x 600high min.<\/p>\n\n\n\n An assumed weight of 30kg per point load to each top chord (60kg per truss) of the 3 trusses is applied to allow unit to be supported by 2 trusses<\/p>\n\n\n\nStandard trusses<\/h3>\n\n\n\n
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Girder Trusses<\/h3>\n\n\n\n
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Valley Trusses<\/h3>\n\n\n\n
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Timber cuts<\/h3>\n\n\n\n
Panel Lengths:<\/h3>\n\n\n\n
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Design Criteria<\/h2>\n\n\n\n
Wind Speed<\/h3>\n\n\n\n
Roof Loads<\/h3>\n\n\n\n
Ceiling loads<\/h3>\n\n\n\n
Truss Spacing<\/h3>\n\n\n\n
Special Truss Spacing Allowances:<\/h3>\n\n\n\n
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Girder Stations:<\/h3>\n\n\n\n
Garage lintels and other large openings<\/h3>\n\n\n\n
Internal Load Bearing Walls:<\/h3>\n\n\n\n
Overhangs:<\/h3>\n\n\n\n
Hip ends:<\/h3>\n\n\n\n
Gable ends:<\/h3>\n\n\n\n
Box Gutters<\/h3>\n\n\n\n
Additional Loads<\/h3>\n\n\n\n
A\/C Units<\/h3>\n\n\n\n
Truss Ancillaries<\/h2>\n\n\n\n