Probably be Universal Beams. a standard brick is 65mm high so by the time you add mortar the 140mm height means you get two courses of bricks and 1 lintel to even match up. I am guessing (emphasis on guessing) that the SDS is quickly going through plaster and maybe. #1. 2m. Current lintel fitted i think is 300mm x 90 mm concrete spanning both courses of brickwork. Design will show that a 65mm p/s concrete lintel is ok - cost about £10. It is quite normal to have the slight overhang, wider than 6mm if that's the way it works out. I have BC coming round end of next as we are starting a 2nd story extension. Suits Screw Diameter. This method takes minutes - lintels and 2 pours takes hours!Hi I have a small room on the front of our house which has has what looks like two lintels put in, however I wanted to put a stud wall in attaching the head bar to one of the lintels. Thanks for the advice Phil. Hi can anyone suggest how to fit upvc fascia board to this sandstone lintel i was thinking of just no more nails some sort of wooden subframe I've got. OP you're overthinking. Doesn't look like a lintel is in place on the external skin brickwork. If you really want to be safe then when you come to replace the windows you get a structural engineer in first. Phil the Paver Screwfix Select. the reinforcement steel inside) that is holding the wall above it. There is a beam resting above the window in the garage and this has caused the metal lintel to bow causing cracking around the mortar of the breeze blocks on the inside wall. Hi, I'm in a predicament with what lintel to put above a garage door, im currently building a 5. Option 1 - I take a loss on the window I bought, buy a smaller window that fits under the RSJ and somehow cover the RSJ with trim. I’ve taken away the wood surround to expose the brick work behind and I can’t see a lintel. Acrow into place. Step 1: is the lintel man enough to carry the loads? Step 2: install following manufacturers instructions to prop during brickwork as span > 1500. Use either lintel or angle iron between brackets. Screwfix Community Forum. The bricks are probably over-hanging the lintel edges so you can't see anything. Fixings not included. The 2 seperate lintels support the struts and are obviously bearing the weight of the roof. An surveyor will probably cost £100 for the call out, inspection and short report and advice on how to fix it. I am planning on getting this side window removed and bricked and have one fitted so that it faces out to the garden to let more light in. 3 lintels in total. Phil the Paver Screwfix Select If you are removing the door to leave an opening, then i would fit a concrete lintel in above the door frame before you remove it, and then plaster over it after. I am planning to purchase a semi detached property, which has got 2 concrete lintels inside the integral-garage which supports the wall above. S Builders New Member. Is this possible?On this same wall there is also a bowing lintel above the window in the bottom right of the image which would need to be dealt with at the same time. I intend to replace the conservatory, but just find that the mortar above the lintel has cracks causing like 3-5mm horizontal gap. BuilderMCR, Feb 12, 2014. CLEARANCE. Agree with Jord comments above. Imagine the lintel has sagged say 20mm in the middle and you want a level surface to attach your door frame fixings, level surface can be obtained by running a 25mm thick piece of wood fixed at the centre of the sag and and fixed at the outer edges with 20mm spacer pieces to fill in the gap between the lintel and. The builder gave a fixed price quote. There. 1,The lintel on the brickwork should realy have a bed under it but not essential. " It just doesn't give any indication how mature the mortar should be before removing the props - that's why I posted my question. However, there is no bowing of the lintel above the window or any issues with the external masonry. Hi Im running alarm cable to a door frame but there is a concrete lintel where above the door. 22 each (Inc. I saw three of the four lintels that the builder took out. Test one out before drilling all the holes. View attachment 24992. Cotswold Builders, Mar 6, 2015. As above r2eally , when installing insulated cavity lintels do i need to cover with dpm and have weep holes, seems a bit hit and miss from info ive found so im not sure if you need todo this or not. This added over 50% more cost to. Richard_, Oct 5, 2019. Order Rawlplug Metal Wall Plugs 6mm x 32mm 50 Pack at Screwfix. Any ideas please? fred812, Jun 18, 2021. stuart44 Screwfix Select. 2. However if the lines of influence spread out at 30 degrees there would be no loading on the pipe. beam direct onto the brickwork. It's solid but I know rust eats through eventually which has scared me a little. Support bracket for removal of internal chimney breast. I plan to put L10 IG Steel Lintels in, with a span of 1500mm and 2400mm (includes 150mm overhang at each end) which will carry approx 2-3 courses of brick. stuart44 Screwfix Select. Bed it in nicely, and allow the mortar to set for. As you say the lintel is only holding 1 row of bricks so not supporting a very heavy load. After the new lintels are in place. 'I-beam, H-beam, girder, lintel, Rolled Steel Joist, Rigid Steel Joist etc. The stone lintel could be removed and repaired with threaded rods through from left to right, tighten the nuts and pull the lintel back together, re fit the lintel as decoration only. Bed your pad stone down as well. Steve_K New Member. 5 for the floor load and doesn't leave much for the brickwork and any roof loads on the wall. Discussion in ' Builders' Talk ' started by zak99, Apr 20, 2013 . As you can see the pad stone bearing (in yellow box) for lintel is 115mm instead of the minimal 150mm required. white rabbit Member. If they're sensible. Self tapping screws into the lintel to create a strong fixing as the blinds are very heavy. 4kg/m. the biggest rsj may support the weight above, but the rsj might wheigh 25tonnes in which case the footings will start to sink. 17810219 UB @ 1100mm - Probably. You could use a self tapper if you're feeling especially technical but there really is no need, imo. Discussion in 'Builders' Talk' started by shaun1235456, Apr 13, 2017. 50 - £ 35 View options Catnic ANG Lintels - 1200mm Steel Angle Lintel £ 51 Add to. I would have said not to be concerned but the crack is also on the. SJ, Dec 15, 2003 #2. Tags: lintel; shed roof; Jugs69 New Member. CGN Screwfix Select. Got a vaulted cellar under the kitchen. Most of the windows on the front of the home (though not all) have large gaps between the window and the steel lintel (up to 2. You should find a wooden lintol behind the arch, supporting the inside brickwork. Support 1 course above where catnic is going using props and strong boys, remove area where lintel is going, bed lintel in on mortar (level both ways obv) with at least 150mm overhang each side, prop lintel off brick below, build brick off lintel to meet upper course. Clearly there was some major lack of coordination between the brick layers and the appropriate position of the window frames. There are timber lintels throughout. Hammerman99, Mar 4, 2012. These usually need to be re-cut and a lintel put in, but this is a major disruption both internally and externally. Anyway it cost me £180 to have one installed and they used props to hold up brickwork. Buy online & collect in hundreds of stores in as little as 1 minute! Free returns. The easiest/most effective solution is to drill into the lintel. Builders Metalwork. 0. . Cut a few holes in the wall and slide in some needles and jack the needles across the upper edge of the opening - Next cut a timber the width and depth of the opening and jack it in place below the opening and whack out the rotten timber. The Tech Spec for the lintel states: "As the brickwork mortar matures, lintels of over 1200mm spans should be propped at 1200mm centres. Hausfix, Sep 15, 2022. The lintel is above a first floor glazing opening which is floor to ceiling height and spans 3. Do not attempt to join lintels. Screwfix Community Forum. They have become a little wobbly since the. Steel Shelf Angle Lintel. The project has secured Building Consent from local planning although there has been no. It is supposed to allow you to replace lintels and even put in steels without having to pin and prop. 65x1. 4m. I’m widening the door frames in my house to 76cm ones. Log in or Sign up. stevie22 Screwfix Select. If it's under the arch, cut the frame don't lever it out whole. Read the table on you link your 65mm lintel over a 2. D. You'll most likely be chucking it away after use as it'll be too blunt to be of much use (unless of course you're equipped and skilled to sharpen it). I was thinking of buying a 8mm thick 70mm. The UK’s leading retailer of trade tools and hardware. #11. When lintels were cast insitu the steel was put in the bottom as this was in tension. £29. The correct way is to butter the top of the Lintel/RSJ/Beam with a decent mortar mix say 4 to 1 sand/cement, then carefully lift it into position and have a third pair of hands pinching the acrows up until they’re nice and tight, not too tight though otherwise you’ll start disturbing brickwork up above, then jam slate or. Is a stressed concrete lintel suitable for this job (like a wide doorway)? Or should I put a steel section in there? Thanks. Bigger window and lintel replacement. A lintel, whether concrete,metal should have a minimum bearing of 150mm bearing each end,now't wrong with a lintel having a bit more support each end. Discussion in. There is actually an existing opening into another room which sits right. Architect has advised to use a box 200 lintel, but what are my options. Drilling into a lintel seems like a bad idea, what with it holding up the wall and everything. The chimney is now completely out and supported in the loft but the. Hi all, I have two non load bearing concrete blockwork walls. Hi all, I'm moving a door opening 350mm to one side and need to know what lintel to use, the current door way was put in years ago to access the garage and goes through light block wall, above it is 1 and 12 light block which support 3. Many thanks - JED. Prevent heating of the drill bit by using water. To prevent corbonation it must be vibrated and the mix. #2. Jord86 Screwfix Select Some pictures of the whole wall would be helpful. Don't reuse the old lintel. Build up the right hand wall to support the lintel then cut away the excess on the left. Will SF basic wood screws work fine or do I need to buy a specific type / brand? What's your preffered screw type /brand for fixing into lintels? Thanks. 5kn. Total load unfactored = 1. The info on this can be a bit confusing, but basically Catnic claim their lintels don't need a tray whereas others do need them. The wall ia load bearing for the floor joists above and a wall which itself is not load bearing. A crack in a reinforced concrete lintel isn't going to be of much concern normally, but this sounds like it could have been a very heavy/substantial impact in a direction the lintel isn't designed to be strong - something of an unknown quantity - I'd want it replaced. Hausfix, Jun 13, 2022. It's a source of noise and draught but not sure how and if it should be covered. stuart44, Severntrent and CGN like this. 5kn per sq metre. Chang New Member. 5 x 200 =32 kg. All you see is the steel lip and then the bricks. I am looking to put a concrete lintel above this which will support a single coarse of blocks and the flat roof. #19. Hi, Confused myself on regs (we are in Wales) for lintel overhang (bit that rests on block work), always thought was 150mm each end on new block work, builder put some lintels in today over a 900 wide window opening, the window is on first floor with a second floor to go above. additional dead weight = 145. 30 mins later van and Oxyacetylene cylinders set up. The stone lintel could be removed and repaired with threaded rods through from left to right, tighten the nuts and pull the lintel back together, re fit the lintel as decoration only. Measuring the gap is totally pointless yet simple to estimate, the 20mm side has a 7mm gap whereas the 24mm side has an 11mm gap, based on it being 12. Abrickie Screwfix Select From those photos, it looks like the it’s a very slight arch, which makes sense as there is no sign the original window sat forward in the outer skin of brickwork, if this is the case the arch needs rebuilding not a lintel inserting. But if the underside of your foundations are 1. I would put a slightly longer lintel in that is toothed into the sides of the original builders opening. Wanting some advice. from $586 12 from. I’ve got a solid brick wall at around 350mm thickness with an opening of 2. FREE next day delivery available, free collection in 1. Just 3x beams/lintels going in, 1x for the double garage opening of 4m, 1x for the middle span 5. rogerk101 Screwfix Select. hallbeck New Member. There is 1 window, width 580mm, where I cant put the lintel without changing the. I have exposed the internal side of the concrete lintel above my lounge window as I was adding insulation behind the plasterboard. I would have expected to use accro props with strong bows min of 3 for the big one. Joe the Plumber, Feb 17, 2019. They would be cracking or sagging by now if the lintels aren't enough. I did my best, used standard lintel which I would normally use in similar situation. I thought padstones were supposed to be slate or metal! Mr. The roof construction is 145x45 x3m c16 timbers on 400 centres with a warm deck construction using OSB and expanded pu foam insulation. Click & Collect. All the same to me '. Severntrent Screwfix Select Assuming its a 3" x 4" lintel to C16 grade then calculation shows that strength and deflection wise its in required capacity, calculation was done using a loading nearly 1. The brickwork opening size is 4755mm. Even composite ones with a single bar in the centre or neutral plane can have a rough top as a key for the brickwork. So ref your other post about the steel, it has to carry. Bobby Dazzler, Nov 9, 2020 #2. Hi All, New member so go easy I am thinking of converting my garage and putting Bi-Fold doors in the side. The proper way is to remove chust the 'lintel' bricks first, clean up the slot, dampen, apply a bed of mortar where it'll be 'bearing', and slip in the concrete lintel. Allow to set before then cutting and removing the space below. Will BC say I need a structural engineer to say a. Drill Bits. I have had lintels installed (wooden framed windows) builders thought no lintel needed back in ‘57. #6. Screwfix customers rate this product 4. £75. John Levit said: ↑. May be tricker if you have a 'soldier' brick. Problems started when the timber were replaced with plastic ones. Screwfix Community Forum. Padstones generally not required for Catnics, but in. Steel lintels are structural components installed over an opening in a wall, like a window or a doorway, to support the loads above the gap and prevent the structure. Two questions: 1. S Builders, Oct 12, 2008. 8 m wide. 7 metre clear span (max) is capable of 1kn loads an average floor load is 1. Home Forums > Screwfix Community Forum > Builders' Talk > Which lintel. Finally with 100 bricks and a 215 wide wall you only have 100 left for the lintel beam. Nick058162 New Member. I've got to a few heavy blinds to top fix so need a reliable screw that won't snap when screwing into metal lintels or fail when the blinds are being used. Remove the windows and put a Catnic steel lintel in place making sure that there will be enough support on the left and right. Do I need a new full length steel lintel bridging the whole length, inside and out. Hi all, Bit of a random question! I have an aluminium blind that I want to hang (top mounted) in a window recess. So roughly speaking if I allow some room for the plaster etc I'd likely be able to drill above the lintel if I went in 100mm from the top of the window reveal as seen from the inside? yetanothermike, Jul 12, 2023. In fact, on a door width size opening, you could almost eliminate the lintel once the wall above it was built and the mortar had set. #3. Screwfix Community Forum. 3m span is on your lintel that is 1. Therefore this padstone doubles the area of the steel's footprint. 23mm (517HR) (1) compare For Angle Grinders Sabrefix Gallows Brackets Galvanised Hot Dipped 490mm x 50mm 2 Pack. Some look like they’ve been repaired previously but now have hairline cracks again. The lintel more than likely would have been a separate timber lintel, you can still see the bearings where it sat or it could have been part of the frame with 4x2 horns extending into the brickwork. a standard brick is 65mm high so by the time you add mortar the 140mm height means you get two courses of bricks and 1 lintel to even match up. com. The Stressline fair faced prestressed concrete lintel, 100mm wide x 215mm high, 2. Catnic do a variety of heavy duty lintels, but at the top end of extreme duty are around £500-£600 for that span. Thanks in advance Vin , Jan. Density of thermalite block say 730kg /m3 (depends on specific block used), hence 110kg /m2 for 150mm thick block. Lintel with slope within the cavity 2. I knocking through a single leaf door way from a living room into a newly converted garage (doorway opening will be 90cm) . #4. gangman New Member. There are 2 main types, composite and non composite. Has anyone heard of lintels sagging because of a. Hi Jitender. 2 = 4. If the screw is extremely tight to wind in, it maybe to large for the pilot hole and could snap if this is the case. Morning all after a bit of advice on lintel currently installed. Stephen White New Member. S Builders New Member. #11. 4m long with a clear span of 2. I’m widening the door frames in my house to 76cm ones. #5. I suppose option 2 makes it easier to get the lintel. They are refusing to pay saying wrong lintel was put in and waiting for structural engineer to do his report. Whatever your steel lintel requirements are, we've got it. Bed your pad stone down as well. Fillers and Putty are used to fill or seal holes, cracks, or gaps prior to further decorating. Maybe concrete padstones will be required here. Then fit lintel and angle grind out the opening, from both sides of the wall if its only a 4" grinder. Render on the wall insulation and fibre glass on the roof insulation. Made from top-quality steel, our drill bits are durable, long-lasting and able to withstand even the toughest of drilling tasks. The mortar isn't holding the brickwork and lintel in place and cracks/parting of the two are gradually getting worse. He says the padstone is 8" x 4" whereas the steel's footprint is 4" x 4". 60 metre garage out of 6 inch solids, the span of the door is 4. This is why is quite important to drill a pilot hole 1mm less than the screw to get a good fixing. The lintel has failed at the end, you can see outside where the end has been patched up. 75 x 6. S Builders, Oct 12, 2008. Discussion in 'Builders' Talk' started by adamgee, May 29,. Architect has advised to use a box 200 lintel, but what are my options. 0. The wall plate is supporting to roof rafters as well as roof so there is some load. The smaller the drill bit. 1/ spread mortar along its top surface, use a spare akro to wind it up into place (not too hard tho) then backfill the 2 bearing surfaces on either end. What lintel is on the outer skin? Or is it an arch. . Break out the lintel with a kango in pieces. from $393 62 from. 4 metres. #3. 5 the value that the triangular area of brickwork above the opening actually imparts upon it so structurally wise its well ok as the fact that its. Home Forums > Screwfix Community Forum > Landscaping and Outdoors > Concrete lintels concreted into the ground to support shed, advice. Any advice greatly appreciated. I've been quoted around £10k to deal with the crack and replace the lintel, this seems like a lot though and thought some advice from people with expereince here could let me know whether I. When you use the key to unlock the door, if you leave the key in the lock and open the door the key hits on the lintel above and is prone to snap (as the carpenter found out). But really best to check with BCO who’s going to sign. This would then tie the 2 together. £13. Install a single leaf lintel (Catnic, IG or Keystone lintels) with 150mm overhang each side. Mr. The lintel only needs to support 4 courses of bricks above the door. I have. It is unacceptable to screw two thin lengths of wood together to make a thicker piece and call it a lintel- 'it is not appropriate to the stresses involved'. Option 2 - I replace the cracked concrete lintel with a new concrete lintel and remove the RSJ. I usually use 20mm stones , sand and cement (2, 2, 1) If you make strong formwork with say 18mm plywood with support behind the stones will just disappear into the mix. I am using an SDS drill with 5mm drill bit. So do they normally a one continuous lintel or both houses have separate lintels. 7mm thick plasterboard. com. Having the lintel more or less touching the frame isn't a problem, it just shows they measured an manufactured the windows accurately as you don't want big gaps. Delivery 7 days a week. . Fixings not included. Has excellent adhesion and resists slumping but build up in several layers, allowing each to dry before adding more. Not impressive work by the builder. Steve_11 New Member. Lintels tend to be of similar design so looking on Standard-Concrete. Thanks for any advice. A concrete lintel would suffice, the bottom course of bricks should be able to be drilled and taken out carefully then the new lintel inserted with compo to take up any gaps, you can then use a regular height firedoor. Extra strong. Free returns. Discussion in ' Builders' Talk ' started by tore81, Jun 26, 2022 . stevie22 Screwfix Select. I have no idea how to overcome that as the brackets will not hold up when. sospan, Feb 9, 2017. Google “ Welsh arch” , and no you don’t need a lintel. I've filled in the gaps around the patio doors but there's exposed lintel on top of both of these. this has left a gap between the lintel and brickwork above to be around 2” one side and about 3/4” the other side. 2kN/sqm, So half of a 3. While I think this is the easiest option it might look the worst. When I insert the lintel is it best to:-. To make matters worse, right below the lintels is the main water supply pipe (28mm) which makes it difficult to get them out and even more difficult to. in the end i had to go to another travis perkins. 99 Inc Vat Click & Collect Delivery OX Trade XL-10 Masonry Segmented Diamond Blade 300mm x 20mm (216HP) compare For Disc Cutters For General Masonry, Paving. You could always look at putting in a solid piece of oak as your lintel but you would need to check the stoves specifications for distance from combustables. 1 windows lintel looks a little rotten so I am thinking it will need replacing. as it's not only the lintel that has suffered. jpeg File size: 601. Its an 80's house. Anyone could help to explain their advantages and dis vantages. We thought about putting a timber batten above the window on the inside wall, but the plaster and paint for the whole room is really uneven, so we're just trying to get some. Discussion in 'Builders' Talk' started by Aron82, Nov. I would Get it surveyed. 8m (wall is 3m) and need to support the roof (7×2 joists 18mm osb) but dont have the room for a rsj because of the 2. With concrete up top, a prestressed concrete lintel would not look out of place. We would like to show you a description here but the site won’t allow us. Has anyone heard of. . It'll need to be galvanised so the exposed soffit doesn't rust. Catnic do a variety of heavy duty lintels, but at the top end of extreme duty are around £500-£600 for that span. Severntrent Screwfix Select Load acting on lintel is basically the weight of a 45 degree triangular wedge of brickwork acting from above the opening, Assuming a 800mm opening and weight of 100mm thick brickwork being 200kg/m2 the load on lintel= 0. The plate is rotten as well, along with some of the joists which are also being replaced. The distance from the internal lintel to front of bricks is 90mm. Bob Rathbone, May 7, 2023. 8m opening with a 65mm lintel is capable of 1. Then finish with mortar and leave the Acro's in overnight. Thermal block has cracked diagonally starting from the end of the lintel, both towards the window opening and away from it, and has crumbled away in places. This was more common on brickwork that was n't seen, and obviously when it was seen, the more traditional decorative arch was used directly above the opening. or. Hello, I just had a random question. = 509. Jord86, Aug 29, 2022. Hi, I'm in a predicament with what lintel to put above a garage door, im currently building a 5. Your screws are too short and the self tapping side of things is pointless for this scenario. however now ive removed the doors ive found theyve used a timber lintel (it is a load bearing wall), the width of the opening is 3. £75. Or hire a builder for a day. yetanothermike Member. It looks OK, no rot. 7kn/m run. If the wall is load bearing and is 1200mm you may need a rsj. Bob Rathbone Screwfix Select. CGN, Jan 16, 2022. You need to check with whoever has speccd them to ensure they meet structural design. forever i said! I'm hear all week! Major Mal Funxion, Jun 26, 2008 #1. Has excellent adhesion and resists slumping but build up in several layers, allowing each to dry before adding more. When knocking through the builders put a concrete lintel on the brick wall side but on the other wall (breezeblock I think!) the wall is supported by wood. It's not just a question of replacing the lintel either. There seems to be no evidence of an external lintel but is defiantly an internal concrete lintel for the inner course of brick. 30 day money back guarantee. 31 each (Inc. There has obviously been a timber lintel there before the pvc cowboys came along and fitted the existing door. 5 = 0. There was a curtain rail already nailed in (by the original builder ~40 years ago most likely), about 3 inches above the top of the window, so would anywhere above that point be ok? I read that most curtains are added about 6 inches above the window so would that be a safer bet? This is my first time doing any household DIY so many thanks!Hi, I need a lintel for over a ground floor door opening, I'm moving the opening about 350mm to the side, above is 1 and 12 light block and the floor joists for a bedroom, every room upstairs is stud wall so nothing other than the joists and blocks need support, the doorway is into the garage and was put in long after the house was built, and. That would be plenty to go under it and still leave you about 80 - 55mm of lintel to put the acrows onto. When it is cold it is contracted leaving small gaps between the brick and the pointing for which rainwater can get into, when it is warm it is flushed with the bricks. Everything else has gone fine so far and I don't want to walk away from a home. 65 could work dependant on the situation so it might be worth a number crunch instead of reaching for the breaker. Therefor the lintel needs to be able to support that, plus hold the door frame. I would like to replace the lintels as it got a crack. e. Home Forums > Screwfix Community Forum > Builders' Talk > Lintel alternative? Discussion in 'Builders' Talk' started by mcooper2406, Jun 23, 2019. I understand the loading to be 1. I took the bricks out and put them back in (with the help of a bricky. The upstairs ones you cannot even see above the solider bricks before you hit the roof. The ground floor is orignal 500mm thick singel skin walls with 2 windows which have old wooden lintels both windows under 1m. But guess main question is does it matter, is there a gap above where the frame of the doors will go, with a metal lintel like that was expecting it to be dead flat especially as second storey still to go: Easier to see in this picture, if I put a long level over at front then rocks on the bend although quite hard to see in picture:Order online at Screwfix. If the wall seems intact then you do. Build up the right hand wall to support the lintel then cut away the excess on the left. The Tech Spec for the lintel states: "As the brickwork mortar matures, lintels of over 1200mm spans should be propped at 1200mm centres. Footings and load calculations will be required. Click and Collect is available or enjoy free UK delivery on selected orders over £150 ex VAT. Or if you have some money rent one from a local rental place (cheaper than the chains). If you’ve got a brand new drill bit, you’ll find it quick and easy. You could almost certainly neatly cut out the horizontal row of bricks immediately above your proposed door frame using your saw so's you can slip your lintel straight in (with a min 150mm overlap at each end - I think. Cut a slot with an angle grinder with diamond blade. Discussion in 'Builders' Talk' started by Pawr, Apr 29, 2017. Wooden windows were replaced with uPVC around 8 years ago and from what I read that may have contributed to the problem. 6m and 1x for some french doors opposite wall to the garage door at 2. From flat steel lintels to catnic steel lintels. There is no lintel so i began to put one in but was wondering if i could open up the fireplace wider as in right to the edge. Thanks We want to extend this opening from 46" to 55",I know I need a 1800 x 100 concrete lintel but not sure of what height I need,the 1 fitted is 65 mm many thanks.