The questions buyers ask before they call.
Every tool on this site exists because people kept asking one question. These pages answer those questions in plain words, with the answer in the first two sentences and no pitch in front of it. Where the honest answer is "that depends, and here is exactly what it depends on," that is what you get. Each page links to the tool that runs the same variables.
Strut channel load and span
How much weight can strut channel support?
Why there is no single strut load rating, which variables move it, and how to read the manufacturer's table for the part you are actually buying
Read the answer →What is the maximum span for strut channel between supports?
Span comes out of the load table after you fix the load, the support condition, and the deflection limit, and deflection usually decides before strength does
Read the answer →12 gauge vs 14 gauge strut channel: what changes?
What the gauge number means, what heavier steel buys you, what it costs in weight and handling, and when adding a support beats upgrading the whole run
Read the answer →Cable tray and bonding
Can cable tray be used as the equipment grounding conductor?
The tray-as-ground question and the jumper-sizing question live in different code sections, what NEC 392.60(A) turns on, and how the call actually gets made on a job
Read the answer →Do you size the grounding conductor from the breaker or the wire?
The equipment grounding conductor is sized from the overcurrent device rating rather than the circuit conductors, why the fault-current job makes that the right index, and the one cap in 250.122(A)
Read the answer →How much bigger does an aluminum grounding conductor need to be?
Aluminum runs one to two AWG sizes larger than copper at the same device rating, the verified pairs from NEC Table 250.122, and why there is no conversion factor to apply
Read the answer →Hauling and CDL
Does a 14,000 lb trailer require a CDL?
A trailer over 10,000 lb is one condition of two, the combination still has to reach 26,001 lb, and three separate tests can get it there
Read the answer →What does GCWR actually limit?
GCWR is the ceiling for truck and trailer as one unit, how it differs from tow rating, GVWR, and payload, and why the federal screen takes the greater of the rated value or the sum of the GVWRs
Read the answer →Do you need a CDL to haul your own equipment?
Federal CDL rules turn on use in commerce, hauling your own machine to your own job is usually business use, and the exceptions that do exist live with your state
Read the answer →Moving and selling
How do you buy a house before selling your current one?
The five arrangements people actually use to close on the next house first, what each one costs in money or in negotiating position, and which situation each one suits
Read the answer →What is a home sale contingency, and does it weaken your offer?
What the clause covers, why sellers read it as timing risk they cannot control, what a kick-out clause changes, and what people use instead when a seller will not take it
Read the answer →What question do your buyers ask all day?
If your team answers the same question on the phone every week, it is worth a page and usually worth a tool. That is what we build.