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What is the Stramit Steel-MAX Floor Framing System ?

General specification & check list.

What we do NOT provide:-

Steel-MAX and Stramit and your system supplier do NOT provide footing designs. Our design offer is strictly limited to the physical extent of the floor system components shown in the associated project drawings. EG: from the stump bases to the tops of floor joists; unless noted otherwise. The customer’s own design engineer must provide footing details for the job, to suit local site conditions and this channel floor framing system’s grid loads, as any previous details for other floor systems may no longer apply.

Accuracy:-

If the project’s full plan was not supplied, some details may have been assumed from the information provided and some dimensions may have been scaled from drawings supplied. Therefore all information contained MUST be checked by the user for accuracy, prior to ordering and using the material, products and methods suggested.

Note:- Stump and post tube quantities are estimates only. They are supplied in stock lengths for cutting on site by the builder. All nominated dimensions and cutting lengths shown on the jobs documents are provided on the condition that we are given clear, complete and accurate frame dimensions. These dimensions and cutting lengths must be checked and approved by the customer prior to supply. Where we are not provided with clear, complete and accurate frame dimensions, we will assume frame dimensions from the information provided to us by the customer and members will be supplied in “stock” lengths of 200 mm increments, rounded up for cutting on site by the builder. Customers may specify cut lengths from site measurements if necessary.

Certification & design criteria:-

Note: This suggested channel floor framing system uses the general building principals described in the Building Code of Australia. Refer to the BCA including AS 1684, AS 2870 and AS3623 for general construction and installation procedures.

Unless stated otherwise; this suggested floor system has been designed to suit:-

1. A domestic “platform floor” with evenly distributed loads, as described in the BCA, AS 1684 and the Steel-MAX Channel Connection guide, supporting a trussed roof to external walls only, with no special point or concentrated loads, unless noted on the associated drawings.
2. Sheet flooring, such as proprietary particle board and plywood products throughout the whole floor area under roof, with no step-downs allowed for wet areas or similar and no additional joists or blocking at wet area junctions to main floor areas.
3. Double joists below all external walls where walls run parallel with the joists.
4. Open timber strip decking to verandahs and decks running in the long direction.
5. Stumps to support perimeter deck bearers with posts above by others, unless roof or rail height posts are shown on our details.
6. Where posts to roof or rail height are included; the outer bearers will run continuously past the outer face of the posts. This will increase the deck size accordingly.
7. All joists spaced @ 450 c/c to main floors and decks.
8. All stumps supporting free standing floors are assumed to be cast-into footings 450 mm to provide cantilevered bracing.
9. All stumps supporting enclosed floors where the enclosing structure provides all necessary sub-floor bracing, such as full masonry, masonry veneer, or masonry based structures are fixed to the tops of footings.
10. Engaged masonry piers @ 2.0 m max. c/c are assumed and allowed for the support of perimeter bearers to full masonry, masonry veneer, or masonry based structures; with all intermediate bearer support provided by Steel-MAX stumps. Bearers must have a minimum of 200 mm bearing along the bearer and 100 mm minimum bearing at the end. Web stiffeners will be provided for bearers where direct bearing occurs.
11. Class “M” soil type and wind category “N3”.

All “C” channel bearers & joists are designed individually for each project, using Stramit’s Steel-MAX System Technical Manuals. A certificate of compliance letter of certification is provided by our engineers, once the complete floor system is ordered from your supplier.

All Steel-MAX products used in this system have been certified for use and a copy of the letter of certification is available on the Steel-MAX web site. www.steelmax.com.au

This floor framing system is very flexible and adaptable for most situations & there are often many layout solutions available for most floors. This is one suggestion, based on our understanding of the project. It may NOT be the same as your original sub-floor design, or any other floor system design and it may be altered if required to suit your specific requirements. Your quotation is based on THIS sub-floor layout and NOT any previous, existing or other design.

We offer design solutions as a suggestion, based upon the information supplied to us and our understanding of the site conditions, for the consideration of the customer and his project engineer. It is imperative that the customer’s project engineer looks at the suggested details and either incorporates them into his whole job structural design or requests alterations to suit his needs. It is always possible that there could be an influencing element within the structure, that we are not aware of, which could affect and alter the design.

Disclaimer:-

Whilst every care is taken in the preparation of the information that Steel-MAX and Stramit provides, Steel-MAX and Stramit accepts no liability for the accuracy of that information. To the fullest extent permitted by law, Steel-MAX and Stramit expressly disclaim all and any liability to any person or corporate entity in respect of anything done, provided or omitted and the consequences of anything done, provided or omitted, by any such person or corporation in reliance, whether in whole or in part upon the whole or any part of the information provided by Steel-MAX and Stramit.

Steel-MAX and Stramit offers this structure review plan and associated information, which has been prepared from information supplied to Steel-MAX or Stramit at the time of review. Steel-MAX and Stramit may not be fully aware of the structurally specific and/or site specific matters affecting the design of the structure for which this plan has been prepared, other than those matters if any, which have been specifically drawn to Steel-MAX’s or Stramit’s attention. Steel-MAX and Stramit cannot accept any responsibility for the accuracy of the information, including, without limitation, designs, supplied to Steel-MAX or Stramit and on which this plan and information is based. These floor framing details are prepared and provided to Steel-MAX’s and Stramit’s customers for their sole use and benefit only. All information enclosed and contained within associated documents relating to this job represents a suggested method of using Steel-MAX’s and Stramit’s products and associated components to construct a floor frame for this job only and may not suit a different application.

Safety warning:-

This floor framing system has been designed for domestic loads and use only. It is not suitable for commercial use, unless specifically noted on the quotation drawings and certified fit for use by our engineer. Decks & exposed floor framing:- Steel-MAX and Stramit recommends that exposed steel deck framing panels are installed separate from main floor framing, but mechanically connected to the main floor frame with screws and/or bolts and Wattle rubberised protection paint should be used between abutting members, to help prevent the transfer of corrosive elements. Adequate protection must be provided to all exposed steel framing, in accordance with the information provided on the Steel-MAX web site. Refer to the Steel-MAX “Extra Information” document for corrosion precaution notes. Tops of deck joists may be painted with Wattle PermaCLOR PR 30, to protect the gal. joists, prior to fixing decking, but the paint for this purpose is NOT included in this quote.

Exposed decks & certain floors which are subjected to corrosive elements must be adequately protected from corrosion. Steel-MAX and Stramit recommends painting all members with Wattle PermaCLOR PR 30 or equivalent, where exposed to corrosive elements. Stramit “ZAM” finished channel may also be used in certain applications to minimise the affects of corrosion to the structural steel members.

Non seasoned timber and similar unstable products are not recommended to be fixed to steel members, in exposed conditions, due to the possible incidence of metal fatigue to hardened steel fixings, caused by the continual expansion and contraction movement of these products in relation to the more stable and inert steel sections.

Hints:-

Refer also to the “Channel Floor Connection Guide” and the “Extra Information” PDF files, which are available on the Steel-MAX web site www.steelmax.com.au . Generally; when setting out your stump grid; measure in ~ 45 mm to the centre of all 75 mm perimeter stumps, for a clad design then divide main areas equally or as shown diagrammatically on the attached diagram. Note: All dimensions to be confirmed by the user, on site prior to ordering channel, stump tube and other sections from your supplier. Use good building practice and ensure that all connections are structurally sound. Permanent sub-floor bracing must be designed in conjunction with footings and installed prior to constructing the superstructure or loading the floor framing area. Some stumps and posts may need to be reinforced or replaced with heavier sections, if side impact loads are expected from vehicles or similar sources. This requires special design by others, and is not included. Provide additional support directly below heavy live and furniture floor loads such as pool tables; fire places, spas, etc., which may not be included in this sub-floor design. Additional support may be required below load points from the superstructure, ( yet to be determined by others ) eg: upper floor framing by others, roof beams and girder trusses and other point loads which is not included in this detail. Note:- The information contained within this document is current at 1st August 2010 and is subject to change at any time without notice. Always check with your Stramit supplier or Steel-MAX, that the information you have is current.