Quantity Takeoff · pieces, packs and open choices
Self drilling screw quantity takeoff for a clearer RFQ
Translate the approved fastener schedule into purchase quantities. This guide helps describe units and unresolved specifications; it does not calculate an installation pattern or recommend fastener spacing.
Send your quantity scheduleBuild a line that can be counted twice
01 · Separate the specification from the count
Write the self drilling screw diameter, length, head and drive, drill point, material and finish before the quantity. Record the substrate thickness that the supplier must address. A change to point type or material is a specification change, even when the total number of screws remains the same.
Use mm or inch consistently and identify what the length measurement represents on the offered drawing. A public drill point specification reference can help frame the question, but the quoted item must carry its own dimensions and applicable drilling range.
02 · Convert packs without losing the piece requirement
Keep required pieces and proposed pack size in separate columns. As a counting example, 2,400 required pieces divided by 200 pieces per pack equals 12 packs. If an alternative is 250 pieces per pack, 10 packs contain 2,500 pieces. Those are arithmetic examples, not offered pack sizes, MOQ or recommended allowances.
Ask whether the stated unit price applies per piece, per hundred, per thousand or per carton. A quote line using “box” without its contained count cannot be compared fairly with a per-piece line.
03 · State the assumptions that affect ordering
The approved takeoff owner should set any spare or loss allowance. Do not copy a generic percentage from a website. Separate phase quantities, delivery locations and requested dates, then ask how carton rounding and minimum order requirements affect the final order count.
Resolve the open choices
Quantity & packaging
Can pack convenience outweigh unit price?
Small packs can make staged issue and counting easier, while larger cartons may change handling and packaging cost. Compare the delivered piece count, opening and storage needs and surplus quantity. Treat these as buyer preferences, not proof of supplier quality.
Can I send area instead of a screw count?
Send the area as project context, but ask the responsible project reviewer for the fastening schedule and approved spacing. Area alone does not establish a safe or complete screw quantity.
Budget & verification
What budget basis is useful?
Specify currency and whether the target applies per piece, per pack or to the total order. Note whether freight and service costs are included. You do not need an existing supplier quotation to explain the purchasing limit.
How should an alternative be checked?
Ask the supplier to identify differences in point, head, coating and pack count in writing. Tie any sample to the drawing revision and confirm the document set for the proposed lot. Only an approved specification can settle whether a proposed change is acceptable.
Continue with the procurement brief or review the catalog inquiry options.
Request a quote using your counted units
Send one line per size, the required pieces and any known pack preference. Flag quantities or dimensions that are provisional. We can then ask factories to state the offered count basis and quote exclusions clearly.