need ladder 3366mm = 11ft length

Richard Smith · 2025-10-15T21:18:04+00:00

You are folk of many and diverse talents.In my outbuilding, to get up to the space above the horizontal roofbeams, I need a ladder exactly 3366mm length.That's(/ 3366 25.4 12) ;; 11.043307086614172 ;; ft(- (/ 3366 25.4) (* 11 12)) ;; 0.5196850393700743 ;; inches11ft lengthIn explanation* 3120mm floor to roof-beam base vertically* 1-to-4 rule - 1 length "out" for 4 lengths of height* which means length of ladder is sqrt(17/16) of vertical height (comes from "Pythagoras")So(+ (* (sqrt (/ 17.0 16)) ;; 1.0307764064044151 3120) ;; 3216.0223879817754 100 ;; mm ;; the height of the roof beams 50 ;; just a bit more ) ;; 3366.0223879817754The idea is, that allows me to carry that ladder into the outbuildingreadily, then tip it upright and "catch" whichever roof-beam I want itto lean against.Then I can leave that ladder propped up vertically against the farwall without being long enough to hit the roof.How would one arrive at a ladder of exactly that length?Any advice?Rich S

Oct 15, 2025 Last reply: 8 months ago 21 Replies

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I got a "simple" single-section ladder of just the right length. Found one available. Ordered mail-order because that had it delivered to the door. No need to work out how to transport.

Leans at 1-to-4 angle against horizontal timbers, yet is short enough to go upright against the end-wall to store.

Happy days :-)

I can spin it around about the vertical axis through 180deg at any gap between the roof trusses, to face the opposite direction.

I am very pleased with the simplicity and light weight. I am pleased with myself for seeing this simplicity.

Regards, Rich Smith

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Despite having two extensions, two 8', two 6' and one 5' step ladders plus a

16' and 12' Z-folders the ones I use most are short ones like yours salvaged from the free damaged ladder.

That quantity is from opportunity rather than intent.

door. No need to work out how to transport... Rich Smith

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My CRV, whose body is a close copy of the Land Rover Freelander 1, has roof rack mounting studs hidden under the roof trim strips above the doors. Other vehicles may also have them in those channels which hide the roof to side weld seams.

It also has tapped attachment points for rear child seat upper straps hidden under the roof liner ahead of the rear hatch hinge. They aren't marked and have to be found by feel. I added the fittings for general purpose cargo tie-downs to secure weighty machinery I didn't expect to find, such as the

90+ Lb carbide grinder and Champion forge blower.

The only sign these exist is their inclusion in the accessories listing.

need ladder 3366mm = 11ft length

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