How to Calculate Cuplock Scaffolding Quantity

Cuplock scaffolding is used to support slabs and beams while concrete sets. Before you order, you need four numbers: how many verticals, how many ledgers, and how many base jacks and U jacks. This guide shows the simple method, with a worked example.

Step 1: Fix the grid spacing

Cuplock verticals stand in a grid under the slab. The distance between them is the length of the ledger you use. Buildrich ledgers come in 0.5, 1, 1.2, 1.5, 2 and 2.5 m. Your engineer chooses the spacing for your slab.

Step 2: Count the standing points

Standing points along the length = length ÷ spacing + 1. Do the same for the width. Multiply the two.

Standing points = (L ÷ s + 1) × (W ÷ s + 1)

Step 3: Count the verticals

At each standing point, add vertical pieces to reach the floor height (after allowing for the base jack and U jack). Buildrich verticals come in 3, 2.5, 2, 1.5, 1 and 0.5 m, so you can combine lengths. Total verticals = standing points × pieces per point.

Step 4: Count the ledgers

If there are R rows and C columns of standing points, ledgers per level are:

Ledgers per level = R × (C − 1) + C × (R − 1)

Multiply by the number of ledger levels your engineer specifies.

Step 5: Base jacks and U jacks

One base jack at the bottom and one U jack at the top of every standing point. Buildrich jacks come in 350, 450 and 600 mm lengths.

Worked example

Slab size 12 m × 9 m, grid spacing 1.5 m (example only), 2 ledger levels, one vertical piece per point.

Why buy cuplock from Buildrich

Buildrich is a direct manufacturer with plants in Pune and a production capacity of 500 tons per month. Cuplock is made with automated CO2 welding, and every batch is checked for weld strength, tube thickness and node integrity. Our clients include Tata Projects, Afcons, Shapoorji Pallonji, L&T Construction, HCC and NCC. See cuplock sizes and cuplock ledgers.

Frequently asked questions