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THIS IS A PUBLIC DOCUMENT. IF YOU ARE HAVING TROUBLE EDITING IT, SEND AN EMAIL TO SKITTER@DESIGNJUDGES.COM@dropdown@dropdown@dropdown
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who put the dropdowns in? that's a nice touchFOR SAE USE ONLY
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2026 SES Concerns
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Mono Or All Steel TubeVersionWorksheet NameLocation Of CellsConcernFixed at VersionResponse
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All Steel Tube1.0F3.5-6 Steel TubeCC78 - CC83Rule states The entire top edge of the upper tube or plate must be between 290mm and 345mm above the lowest point of the bottom edge of the Lower SIS tube.
(cell CC78 is correct), but CC82-83 has the incorrect statement carried over from last year (states top surface of the lower SIS but it should say the bottom surface of the lowest point of the lower SIS)

1.1
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All Steel Tube1.0allA25 (all pages)units not updating across all pages <------- (use the excel app)Only working in desktop app.
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All Steel Tube1.0F.10.2.2BE102
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All Steel Tube1.0F.10.5 Battery AttachementCT100, CT101, DD100, DD101Bending in shear and Bending normal percentage calculation appears to be incorrect. When inputting the same quantities into 2025 SES the values pass1.1chassis mounts equation was referencing pullout strength instead of offset distance. also front protection offset mounts.
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All Steel Tube1.0F.3.5-6C16, BI152Front protection check shown as Welded Inserts check. Cell reference is incorrect.1.1C15-C17 repaired
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All Steel Tube1.0F.10.5 Battery AttachementAA99 (Seems to be on all Tractive Battery Mounts) Formula seems to be attempting to pull panel thickness from where it was in 2025 SES, is now throwing a #REF error1.1values pulled from container sheet
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All Steel Tube1.0F.10.5 Battery AttachementAC99, AM99, AW99, BG99Remains blank after fully filling out all prevalent information boxes1.1same issue as above
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All Steel Tube1.0F3.5-6 Steel TubeBO133, BO134 EQ box says #REF for "No" dropdown selection into Bo134, No dropdown for B0134cannot replicate at this time - make sure bolted members tab has not been deleted?
using desktop app?
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All Steel Tube1.1F.4.3 compositeAQ15Energy calculations are generating negative energy values. When same data is input into 2025 data there is no issue. Not only is the value negative but it inreases rapidly.mono v1.2email SES to skitter@designjudges.com
worked in testing - can already see it is not working in v1.0 and v1.1
reverting to uncompensated calculation
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All Steel Tube1.1F.8 Front ProtectionAR99, AX106Quick release shear calculations not switching to EQ when using nut and bolt for AIP attachment, FB tearout calculation not resolving when using tube FB steel v1.2
mono v1.3		quick release incorrectly activated by centerline inserts
disregard quick release section if using nut and bolt centerline inserts
need to fill out if using offset mounts
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All Steel Tube1.1F.7.1-5 Composite Chassis (SIS)V62, V63, Z77There is a slight inconsistency in the F.7.1-5 Composite Chassis (SIS) section. According to the 2026 rule F.6.4.4b the 345mm is to be measured from the Bottom Surface of the Chassis Floor, which aligns with the image. However, in the Z77 and V63 sections, it is explicitly stated as "Top of the SIS Floor"mono v1.3Always measured from the bottom, same reference point as V1.4 ride height.
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Mono1.1F-7.1-5 Composite Chassis
(Rear of Monocoque, Diagonal Removable Rear Panel)		BQ114, BQ115, BQ123, CA99, CA100, CA108Entering the Panel thickness and Insert thickness in the attachment section, the result still shows as "blank." It appears that BV99 and BQ115 are blank and cannot be edited. Also, BP123 is returning "Reject" because F.10.1.-4 Modules And Container L25 is blank, so the value becomes zero. CA99, CA100, CA108 are showing the same issue.mono v1.3Formulas can be fixed after submission, unfortunately does not give a complete answer before upgrade to latest version.
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Mono1.1F.8 Front ProtectionAN76, AN77, AN78, AN79, AN80. AN81, AN82, AM92On the Excel Sheet, it appears as "F.7.1-5 Composite Chassis", but in the formula it still references "F.7 Composite Chassis."mono v1.3Formulas can be fixed after submission, unfortunately does not give a complete answer before upgrade to latest version.
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All Steel Tube1.1
F.10.1-4 Modules and Container
AE97, AH97, AK97Status says reject when I have entered 2 of the 3 material properties even though it says you only need to enter one or more of the following.N/AIt's rejecting because one of the material temperature thresholds is <60C, when the Tractive Battery must be built to >> 60C.
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All Steel Tube1.1F.8 Front ProtectionD81On the Diagonal Aip, and FB section When selected with steel diagonal tube. I have put in that section that its "welded" to "FB" and then it puts a "composite" tag on the sheet rejecting that part of the section. Looking at last years (25) was welded to FB then steel would pop up and would accept that section. All referensed Cells to fill in, in that section are filled out properly for using the steel diagonal tubeadditional check neededProblem should go away once AN40:42 is filled out.
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All Steel Tube1.1F.11.2.4BX100The section asks for Class B tubing for F.3.2.1.n component protection tubing. The rulebook states that F.3.2.1.n is class C. The tube example given in this section does not pass EQ.N/AThis is a live cell. If the Tractive Battery is within 100mm of the Rear Bulkhead (CI68), Size B has to go all the way to the rear of the chassis. F.11.3.1.a.
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All Steel Tube1.1F.8 Front ProtectionAX47, AR-AZ99When Nut and Bolt is selected for 'Bolting AIP to tube Front Bulkhead', The 'Shear Calculation for Positive Locking on Quick Release' reports as blank instead of N/A, like 2025 SES.steel v1.2
mono v1.3		quick release incorrectly activated by centerline inserts
disregard quick release section if using nut and bolt centerline inserts
need to fill out if using offset mounts
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Mono1.2F.7.6-9 Mono AttachmentsCA38Cell formula is checking "F.10.1-4 Modules and Container" for Tractive Battery Chassis Mount type instead of "F.10.5 Battery Attachment". Correct specific cell reference for checking for Chassis mount type, wrong worksheetmono v1.3formulas can be fixed after submission
should be able to use 2025 SES to check entries
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All Steel Tube1.1F3.5-6 Steel TubeAK120, AK137Cell AK120 and AK137 ask for length of weld. If a bracket/tab is welded on both sides, is this considered 2 welds or 1 weld?N/Afull penetration is assumed, so it is only one weld
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All Steel Tube1.2F.8 Front ProtectionAM98#REF!additional check neededThis seems like an entry copy paste error - AM98 is mm or in depending on sheet units.
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F.10.1-4 Modules and Container
AE97, AH97, AK97How come it is being rejected when I enter only one value (above 100 °C)? It states “one or more,” but it only accepts the entry if all three boxes are filled.steel v1.2
mono v1.3		can be fixed after submission
formula updated
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All Steel Tube1.1F.8.2.3.b Bolted IA PlateAX55, AX56Shear Bending & Normal Bending calculations only show 0.00, regardless of inputsteel v1.2
mono v1.3		can be fixed after submission
need to feed it 15kN
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Mono1.2F.7.1-5 Composite Chassis (Diagonal Or Removable Rear Panel)BZ108Formula is checking old location of total segment mass ("F.10.1-4 Modules and Container L25"), should instead be checking under F.10.5 Battery Attachment. steel v1.2
mono v1.3		can be fixed after submission
fixed along with line16
battery mass is irrelevant to rear panel, test load comes from fasteners
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Mono 1.2F.7.6-9 Mono AttachmentsF.7.6-9 Mono Attachments#REF!mono v1.3can be fixed after submission
not comparing tractive battery mono attachment pullout / tearout to tractive battery test load
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All Steel Tube1.1F.8 Front ProtectionAX44Rule F.8.2.3.b states there must be a 2" minimum center to center distance between ay two bolt centers, but the equation on the SES excel sheet (AX44) requires a value of <=2 to passfill out AX41formula signs appear to be in the correct direction AX44 > 2 bolted, AX44 >1 welded
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All Steel Tube1.1F.8 Front ProtectionAD49Rule F.8.5.6 states that the IA should mount with the bttom leading edge 175mm (6.89") or less below the lowest point of the lower SIS, but a value of 3.55" is currently not passing.cannot replicate3.55 passing mm and in, formula appears to be correct, setting maximums 175 or 6.89
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All Steel Tube1.1F.8 Front ProtectionAZ102-108Column calls for fastener properties for AIP to the front bulkhead on a Quick Release, but the method of "Bolting AIP to tube Front Bulkhead" in cell AX47 was set to "Nut And Bolt"steel v1.2
mono v1.3		triplicate
See fixes in lines 21, 14
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All Steel Tube1.1F.3.5-6 Steel TubeAM121Cell referencing old cell for thread engagement lengthsteel v1.2
mono v1.3		wrapped reference corrected
note: AE121 still relevant per rules, 10 thread min engagement in addition to tearout strength
removed reject functioning as minimum thread pitch - no limit
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Mono 1.2F.7.1-5 Composite ChassisAA77, AC77AC77 returning "False" when document units set to inchesmono v1.3can be fixed after submission
reject condition missing from mm setting leads to FALSE in inch setting
consistent error SIS height, RB height 2 places
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All Steel Tube1.2F.8 Front ProtectionAX106AX106 references "N/A" cells in composite front bulkhead section and returns 0 with all other cells in "Pullout and Tearout for Offset Mounts" section filledsteel v1.2
mono v1.3		offset mount test load changed to 8x 15kN
chassis tearout adapted to centerline, offset tube, composite
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All Steel Tube1.1F.8 Front ProtectionAX44AX44 states that the shortest weld must be >= 25mm (1in) but a value of 54.24in is rejectedfill out AX41the attachment entry, after recalculation, will turn this on or N/A
formula signs appear to be in the correct direction AX44 > 2 bolted, AX44 >1 welded
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All Steel Tube1.2F.8 Front ProtectionAX106Cell AX106 is intended to use the 'Tearout' value from AX105 for its calculation; however, updates in AX105 are not being reflected in AX106steel v1.3
mono v1.4		Found this in item 37 below.
Present in mono calc but not tube calc.
We can fix this after submission.
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All Steel Tube1.2F.8 Front ProtectionAR34:AS35Steel t1.5mm AIP mounted to centerline insert cannot satisfy 15kN/Fastener requirement of F.8.2.3b. Let us known the logic why automatically meet 15kN or more.
Minimum edge discance should be 12.5mm (half of OD25mm), So...
365MPa * t1.5mm * 2 * 12.5mm * 0.577 = 7.9 kN <15kN
16 fasteners need to satisfy tortal 120kN requirement .
In fact, AX108 is rejected under the condition bellow:
AX48 = Offcet mount
AX49 = 0
AX103 = 8
AX107 = 12.5		steel v1.3
mono v1.4		Good question.
First of all, the tube has two walls, so double the thickness.
Second, the tearout distance is longer than the pure radius.
So we don't ask for entries for 15kN centerline mounts on Size B.
And the presence of the welded insert adds further reinforcement.

The formula is missing tearout distance.
We can fix this after submission.
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Mono 1.3F.110.1-4 Module And ContainerAU82With lid attachment equivalent to weld, the formula is giving the answer in N/mm^2, which is MPa. However, we keep calculating everything with Pa, so there is either a 1/10^3 over in the formula or there is a 10^3 missing to put back in N/m^2 which is Pa. N/AThis looks right - MPa is 10^6, not 10^3.
So when that goes wrong, the error is usually a lot larger.
The area is done in mm^2, the strength is in Pa, the calculation divides by 10^6.
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All Steel Tube1.2F.10.5 Battery AttachmentBY100;BY101for mounts using round tube, the battery mount passes in ses 2025 but fails in ses 2026. The bending in shear equation seems incomplete or incorrectly implemented in SES 2026N/ARules and SES are refined every year.
2026 SES bending calculation is more accurate for multiple shapes.
Especially L and U shapes with low gusset heights.
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All Steel Tube1.2F.3.5-6 Steel TubeA25 (all pages)Error In Worksheet F.3.5-6 Is references across entirety of SES document. The Worksheet is named F.3.5-6 Steel Tube but referenced as F.3.5-6 Tube Chassis across all other sheets.N/AA25 in all tabs is driven by either the mono F.3.5-6 Tube Chassis or F.3.5-6 Steel Tube.
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All Steel Tube1.2F.8 Front ProtectionNowhere evaluate teaout strength of AIP"The tearout strength of the AIP" seems not evaluated anywhere.
F.8.2.3b requires tearout strength, but is the tearout strength of the AIP not required?
In the case that "The AIP is the same size as the FB out dimension AND is attached by centerline mount", edge distance of AIP is half of FB tube OD.
Question Line 37 askes for that.
Now I've understand that AR34:AS35 is descrived about FB side tearout strength. Is it correct?		2026Worth evaluating for performance at the standard perimeter. Activated only for quick release and offset mounts at this time.
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All Steel Tube1.2F3.5-6 Steel Tube; F.8 Front ProtectionA25Sheet name is not consistent with formula used for units. Units change from mm to inches for all other tabs, but only when uploaded to one drive. (Same error as Row 40 of this document)N/AAs far as I can see, every single tab in the tube and mono SES is the same. Check for mono cell, if yes, bring in mono SES value, if no, bring in steel tube SES value.
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