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Compliance is not required if the floor area of the building is less than 15 square metres. For buildings between 15 square metres and 30 square metres, we can, upon request and at additional cost, include special fire proofing layers in our walls, providing you with a substantially non-combustible structure, which in turn, will allow you to position your Outdoor Room less than one metre from your boundary, saving you valuable space within your garden.
Disclaimer: This guidance relates to the planning and building regulation regime for England. We are able to design your garage conversion to your requirements and give you helpful advice in regards to selecting builders, planning permission and building regulations. Our fixed price design package takes away the worry of expensive design fees and we will always amend your plans free of charge, should any revisions need to be made. We also able to design domestic extensions, garages, porches conservatories and loft conversions for home owners and builders. SANS10400 are the Building regulations in South Africa, and both international and national standards, are fundamental to successful building and construction projects, both big and small.
When the South African National Building Regulations were updated by the Department of Trade and Industry in May 2008, the General Requirement relating to Roofs was changed to incorporate certain safety elements.
While the legislation changed in 2008, it was only in 2011 that Part L: Roofs was published by the SABS. As with most of the National Building Regulations, those that apply to roofs relate to SANS other than the one specific to that particular element. There are several South African National Standards (SANS) that relate to roof timbers, all of which must be complied with when roof trusses and other roofing elements are constructed.
You’ll find the full list in Part L of SANS 10400 (or check with an SABS librarian for the relevant information). Roof design depends on a number of factors including the type of covering you are going to use, and the span over which the roof structure is to be supported. The trusses themselves are made up of rafters, tie beams, posts and struts, all of which are assembled according to a specific design.
The regulations also state that no member of any truss should have a length that is greater than 60 times its smallest dimension.
The basic requirements shown in the table below, apply to Howe-type trusses as listed above. This table is considerably more useful that the one that was in the previous 1990 edition of the regulations, as not only maximum truss spans are indicated, but also the allowable and recommended pitch of the roof, and the member sizes and grades of timber that are specified in SANS 1783-2. You will also see that the maximum centre-to-centre spacing of the trusses varies according to the type of roof covering you are going to be using. Another element that is specified in this table is the type and number of bolts to be used at heel and splice joints (although it must be said that builders often use nails). A heel joint (mentioned here) is simply an indentation that is cut into a rafter so that the timber can rest on the top plate.
The timber grades allowable for softwood and all SA pine rafter beams is Grade 5 and Grade 7. Note that the type of roof covering in this table (maximum clear spans for laminated SA pine supporting a tile or slate roof with a 26 degree pitch)  is shown in the first column, and the rafter spacing in the other four columns. Note that * indicates the most commonly available sizes. Below is a table for maximum clear spans for SA pine purlin rafters or purlin beams supporting profiled metal or fibre-cement sheeting (or metal tiles in the table below) with a 26 degree pitch. Below is a table for maximum clear spans for gum pole rafters with a pitch above 26 degrees and above 26 degrees. The maximum mass of the tiles or slates, including battens or purlins, shall not exceed 65 kg per square metre. When it comes to thatch roofs, generally the slope should be 45 degrees, except at dormer windows where the slope should only be 35 degrees. It is vital that roof trusses and other roof framing elements have joints that are accurately cut, securely made and fitted so that the component parts are drawn tightly together. If rafter construction is used instead of roof trusses, and the roof covering is regular sheeting or tiles (as already mentioned), it is important to accurately assess the parameters for rafter spans and the size and grade of rafters. When constructing a roof framework, the rule of thumb is that any purlin should have a minimum nominal depth and width of 76 mm or 50 mm, and max centre-to-centre spacing between the purlins ought to be 1,2 m. All roof trusses, rafters and beams that are supported by a brick or concrete block (or even a stone) wall must be securely fastened to the wall using galvanized steel strapping or galvanized steel wire that complies with the National Building Regulations. If you order factory-manufactured trusses that are made with metal plate connectors, they may not comply directly with the requirements of the various tables in the SANS. If this method of construction is used, softwood poles must comply with SANS 457-2 and hardwood poles must comply with SANS 457-3, and ALL poles must be treated in accordance with the requirements of SANS 10005. If poles are sawn or reshaped at the ends, any of the exposed ends must be treated with a Class W preservative. For thatched roofs, laths must have a minimum diameter of 25 mm and they must comply with the requirements of SANS 1288.
There are other factors that relate to fire resistance an combustibility, and waterproofing – which of course has to cover (excuse the pun) flashing and flat roofs! Waterproofing refers mainly to runoff water from the roof … and therefore relates directly to the slope of the roof. Part L of the updated national building regulations (published in 2011) also include new sections on roof coverings and waterproofing systems for pitched roofs, and drainage and waterproofing of flat roofs.
Leaves and bad paint may cause water to stand in the real flat sections which will accelerate rust.

I have a IBR (0.58) flat roof, that up till now i taught was built accordingly, to my surprise when obtaining quotes (for general maintenance) only one contractor informed me that my slope was not enough and that it was inadequate.
I have asked my local municipality for one of their experienced roofing engineers to come out to my house and inspect my roof. Hi John, I am sure that you can, but two things come to mind straight away, 1st how are you going to fix the sheeting onto brittle tiles, roof sheets normally will be nailed onto wooden purlins and or battens & 2nd the tiles are usually uneven so it will be difficult to get a nice flat roof laid. 1) My ceiling has sagged and insurance company has already informed me that the wrong nails were used. You have a right to ask for a reference in terms of where an SABS national standard states this.
Regarding exposed trusses, SANS 10243 provides guidance on the manufacture, erection and bracing of timber roof trusses.
I am designing the re roofing of my braai room and the depth of the timber trusses is decreasing the height underneath the roof. There is nothing in Part L: Roofs of SANS 10400 about steel trusses, so I guess you would have to talk to a competent person who is qualified to specify what is required.
You must have JavaScript enabled in your browser to utilize the functionality of this website. The most important dimension for any stair manufacturer is the distance from Finished Floor to Finished Floor.
For example, you cannot have 200mm for the first three risers and then 205mm for the others. However, if the stairs have a flat landing mid-way, then the flight below and above this landing can be treated differently. For the building regulation on this issue see point 1.1 (Page 6)Building Regulations 2010 Part K (Pg 6). For the building regulation on this issue see Point 1.2 (Page 6)Building Regulations 2010 Part K (Pg 6). If the steps are constructed with open risers, then there should be at least a 16mm overlap between treads. To prevent children from falling or getting trapped, all stairs with open risers should be constructed so that a 100mm sphere cannot pass through. For the building regulation regarding Open risers go to point 1.9 (Page 6)Building Regulations 2010 Part K (Pg 6).
For the building regulation regarding Headroom go to point 1.10 (Page 7)Building Regulations 2010 Part K (Pg 7). However, to ensure that a staircase is visually pleasing and comfortable to use, we recommend that your stair width is greater than 860mm including the strings. For the building regulation regarding minimum width of staircase go to point 1.11 (Page 7)Building Regulations 2010 Part K (Pg 7). For the building regulation regarding maximum width of staircase go to point 1.12 (Page 7)Building Regulations 2010 Part K (Pg 7). The use of this type of staircase is quite often interpreted differently by different building Inspectors and generally, they prefer them not to be used. The building regulations state that they can be used for access to a loft with one habitable room, in one or more straight flights only, and only if there is no alternative.
Stairs should have a handrail on at least one side if the stairs are less than 1 meter wide. In all buildings, handrail height should be between 900mm and 1000mm measured from the pitch line to the top of the handrail. Nosings are no longer permitted on staircases used in offices and for staircases used for disabled access.
Wonkee Donkee is able to assist you with any staircase regulation questions you have.Please don't hesitate to contact us on 01938 557733. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Clipping is a handy way to collect and organize the most important slides from a presentation.
If the floor area of the Outdoor Room is between 15 square metres and 30 square metres, you will not normally be required to apply for building regulations approval providing that the building is either at least one metre from any boundary or it is constructed of substantially non-combustible materials.
People carrying out electrical work in homes and gardens in England and Wales should follow the requirements set out in Part P of the Building Regulations to ensure that they are complying with the law.
Although the building itself may be exempt from Building Regulation the new drain may need to comply. We provide a cost effective design solution for home owners, builders and we specialise in dealing with planning permission and building regulations council applications. In simple language, if there is a major wind or some other really horrible weather conditions (God forbid), the roofs of our homes are expected to be able to stay on the house and protect us from the elements without themselves being damaged. This last one, though, is open to interpretation as not all roofs incorporate ceilings as such.
For instance, where any roof is to be supported on the wall of a building as described in the relevant section of Part K: Walls, the roof MUST be constructed in accordance with the rules laid out by the relevant SANS (in this case 10400).
Any qualified designer knows that every one of the SANS that form part of 10400 needs to be considered as a whole. Also note that the maximum mass of tiles or slates, including battens or purlins, should not be more than 65 kg per square metre.

All trussed roofs MUST be provided with approved bracing that prevents any possible buckling of the rafters, tie-beams and long web members. Please note that if the rafter spacing is not the same as that shown in the table below, intermediate values of maximum rafter spans may be interpolated within the range of values suggested for relevant timber grades.
But because they were established as a guide to MINIMUM standards, you must never ignore them. If they have cracked or the end are plot within a space that is equal to the diameter of the pole, they MUST NOT BE USED. It is also necessary to cover at least 35% of the surface area of the end with a new nail plate to prevent or at least minimize cracking.
The roof has been constructed with treated poles and where the poles have been supported by the load bearing wall fine cracks have appeared below each pole….is this normal?????
Its a little bit late for me to now raise the issue of the roof with my estate agent at that time. Possibly take all the tiles off first clean up the battens of protruding nails etc and then put your Chromodeck sheets down. I am not an architect or engineer and cannot provide info on how to adapt an existing installation.
Alternatively get hold of a company that makes steel trusses; chances are they will have an agrement certificate (for a non-standardised product). Most manufactures will ensure that your staircase complies with the appropriate building regulations, but it's wise to check with them first that this is the case.
The regulations may be interpreted in such a way to allow a different rise and going on the bottom flight to the rise and going on the top flight. This will restrict the width at the top of the stairs, but may be an option for you to consider. A handrail on both sides of the stairs will be required if the stair width is greater than this.
Some building inspectors prefer to avoid the use of steps to gain access to a building and instead are insisting on ramps.
In all cases, building regulations do not apply only if the building does not contain any sleeping accommodation.
Our Electrician will carry out a Part P compliance test, the certificate will be included in the document pack that is issued to you on receipt of your final payment. In such cases, we can upon request apply to the local authority on your behalf and deal with the site inspection etc, with the local Building Officer, to ensure compliance.
The above is intended for information purpose only and is not a definitive source of legal information. It’s just because the different new sections were published over a period of years that has made it more of a challenge for many. Where relevant, specifics are shown in the tables for maximum clear spans for sawn softwood beams with a 26 degree pitch below. If you buy from a reputable company you can rest assured that they will be absolutely fine.
If a thatched roof is constructed with gables, without hips, valleys or dormer windows, it must have a pitch of 45 degrees, and a clear span that is no more than 6 m. I have a house where one section of a roof was extended with a pitch of only 11 degrees and tiled, which does not comply with the regulations as I understand it. Or probably easier, check the approved plans to make sure that the roof was built according to plan. My situation is that i purchased this house six months ago and had a roofing contractor requested by thee estate agent to inspect the quality and build of the roof, the same contractor i asked to quote me on performing general maintenance after purchase(not the one that informed me of the incorrect slope). Its unfortunate that i was informed of the incorrect pitch after i signed an offer to purchase. You really do need to talk to a competent person – or someone that manufactures trusses.
Compliance with planning and building regulations is the responsibility of the householder and we strongly recommend that you contact your Local Authority.
They will be either nailed or bolted together on site, or delivered to site on order by a specialist truss manufacturer. Whoever is doing the maths need to be certain that no section of the truss has a length that is greater than 60 times its least (or smallest) dimension.
Construction must also be in accordance with SANS 10407 and with additional specification in SANS 10400-L that are shown in the form of drawings and a table.
If fibre-cement slates were used, the minimum slope had to be at least 10 deg – and if they were less than 17 deg they needed an underlay. In the drawings, specifications for rafters state that if the poles are 100 mm to 125 mm in diameter, then the truss clear spans may not be greater than 4 m. If the poles are 125 mm to 150 mm in diameter, then the spans may be more than 4 m but not greater than 6 m.

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