a glossary of load-bearing nonsense

the engineers who moved the Cape Hatteras lighthouse had a real word for what a bar of Ivory soap gave the steel track: sliptivity. 4,800 tons of brick riding 2,900 feet on drugstore soap, and they named the soap’s contribution like it was a material property. it is the best word i learned this week and i am not going to explain it. i’m going to make more of them.

these are not real. every one describes a thing that is real.

sliptivity (n.) — the willingness of a surface to be gotten across. not slickness, which is a property of the surface alone. sliptivity is relational: it is how much the steel agrees to let the tower pass. soap has it. honesty sometimes has it. a good apology has it. see also: the specific grip of a floor that has just been mopped and lied to you about being dry.

heftance (n.) — the felt weight of a thing you are about to lift, before you lift it, which is always wrong. the box marked FRAGILE that turns out to be pillows. the sentence you dreaded writing that comes out in one go. heftance is the error bar on your own dread.

creakworthiness (n.) — a stair’s, a floorboard’s, a knee’s earned right to make the sound it makes. high creakworthiness means the noise is structural gossip, not a warning. low creakworthiness means run.

tuck (v., intransitive) — what a load does when it finally sits right. you feel it through your hands. the shelf bracket tucks. the tent pole tucks. the argument tucks, and everyone in the room exhales without deciding to.

gribbling (ger.) — the small unglamorous maintenance that is the actual job. the guys crawling along smearing soap. the person who reslices the onions the line cook cut wrong. 90% of every impressive thing is gribbling and nobody photographs it.

margin-of-oh-no (n.) — the distance between “this is holding fine” and “this was never holding, we were fine by luck.” usually invisible until crossed. a good engineer builds a wide one and never gets thanked for the width.

settling-in cost (n.) — the energy a new thing spends learning to bear its own weight. a fresh bolt torqued to spec still creeps a little the first day. a new hire, a new joint, a new habit. it is not failure. it is the thing finding out how heavy it actually is.

dumb-grip (n.) — load-bearing capacity that comes from a material being stupid and stubborn rather than clever. brick has dumb-grip. brick does not bend, does not flex, does not have opinions; it just refuses to be less than itself until it shatters. the lighthouse was kept perfectly level the whole 23 days because brick has no give — one degree of racking and dumb-grip becomes dumb-shatter. the strongest materials are often the ones with the least imagination.

afterhold (n.) — the residual load a structure keeps carrying after the thing it was carrying is gone. the shape a mattress keeps. the way a bridge remembers the trucks. the way a room stays braced for a while after the argument ends. afterhold is why empty houses feel tired.

sog (n.) — the point at which a supporting material has taken on so much of what it was protecting against that it becomes the hazard. wet cardboard. a saturated levee. a friend who has absorbed your crisis until they are the one who needs holding. everything with dumb-grip eventually sogs if you leave it in the weather long enough.

pre-slip (n.) — the tiny movement a jack makes before it takes the load, the slack coming out of the system. you have to allow for pre-slip or your measurements lie. most of what looks like sudden collapse is pre-slip nobody budgeted for, arriving all at once.

honest travel (n.) — motion a structure is designed to make. bridges have it (they’re built to sway; a bridge that can’t move is a bridge about to break). buildings have it. so do people. the trick is telling honest travel from the other kind, and the only real test is whether the thing comes back to level after.

that’s the glossary. eleven words for the parts of holding-things-up that don’t get a name because they aren’t glamorous enough to need one — the soap, the gribbling, the pre-slip, the width of the margin nobody thanks you for.

no thesis. i just wanted more words like sliptivity and now there are more.