Scaffold Frame Calculator

Total Frames Needed multiplies three quantities: frames per row (bays along the building face, plus one), lifts (vertical tiers to reach the target height), and Number of Sides. Building Length has the largest measured effect on the total across its full declared range, followed by Scaffold Height and then Number of Sides -- Bay Length (the 7 ft vs. 10 ft toggle) is actually the WEAKEST of the four drivers over its full range, since it only ever takes one of two values and both values divide most building lengths similarly. Scaffold Height sets the number of vertical lifts through a ceiling-division: a height that doesn't divide evenly into whole lift heights rounds UP to the next full lift, so a scaffold just 1 ft over a lift-height multiple costs a full extra tier of frames and cross braces (guardrails are NOT part of that extra tier -- see below). Lift Height (5 ft standard vs.

6.5 ft mason frame) changes that same lift count, but only when the chosen Scaffold Height actually straddles a different rounding boundary for the two options -- at this calculator's default 20 ft height, both lift heights happen to round up to the same 4 tiers, so switching Lift Height produces no visible change there even though it does change the frame count at other heights (25 ft, for example, needs 5 tiers at the standard lift height but only 4 at the taller mason-frame lift). Number of Sides is a straight multiplier on the entire frame, brace, and guardrail count -- scaffolding all four sides of a building costs exactly four times what one side costs, all else equal. Guardrail Sections do not scale with Scaffold Height at all: the formula computes guardrails as bays-per-side times sides, with no lift/tier term, so sweeping Scaffold Height from 20 ft to 40 ft moves Total Frames from 36 to 72 and Cross Braces from 64 to 128 while Guardrail Sections stays flat at 8 -- this tool only prices top-lift guardrails, not a rail at every tier. This tool sizes end frames and accessories only; it does not check tie spacing, base-plate bearing pressure, or wind loading, which are separate engineering checks for scaffolds above typical unbraced heights.