Log pour elevations, finish elevations, and slab thickness on a tablet during the pour. Calculate F-numbers automatically. Export a clean PDF closeout package that owners and GCs actually want to keep.
Handwritten shot notes from a pour are illegible, disorganized, and disconnected from the design elevations on the drawings. Transcribing them into a Word document takes hours and the result still does not look professional enough for an owner who is spending $2M on a warehouse slab.
Producing F-number documentation per ASTM E1155 requires a grid of elevation shots, correctly ordered, with flatness and levelness calculated from adjacent measurements. Without a structured logging system, getting from field shots to an F-number report is a half-day project management exercise.
Commercial building owners increasingly require digital closeout documentation as a condition of final payment. A Word document assembled from paper notes does not meet that bar. Without a professional PDF closeout, the final pay application stalls.
Sitemark runs on a phone or tablet. Log pour elevation, finish elevation, and slab thickness measurements as they happen on the slab — tied to the job, timestamped, and compared to design elevation. No transcription, no separate spreadsheet.
Enter the elevation grid shots in order. Sitemark calculates F(F) flatness and F(L) levelness per ASTM E1155. The F-number report shows composite values, a grid map of local F-values, and flags sections below specification — ready for the engineer of record.
Sitemark generates a professional PDF showing pour elevations, finish elevations, slab thickness, F-numbers, and design deviations by location. It looks like a deliverable, not a field notebook photo. Owners and GCs request it for their own files.
Log design, pour, and finish elevations by location — deviation calculated automatically.
Calculate F(F) flatness and F(L) levelness from elevation grid shots — composite and local F-values.
Log thickness measurements by location against specified thickness — ACI 117 pass/fail.
Export a formatted PDF covering elevations, thickness, and F-numbers — suitable for owner and GC closeout.
Compare poured and finished elevations to the design FF grade — deviations flagged by location.
Organize documentation by pour area, bay, and phase — multi-pour slab projects in one job.
Flatwork elevation documentation was a notebook and a prayer. Pour elevation, finish elevation, slab thickness measurements — all handwritten, then typed into a Word doc. Now it goes straight into Sitemark on the tablet, ties to the job, and exports a clean PDF. Owners actually want a copy now.
Tom B.
Concrete Contractor
Commercial flatwork · Columbus, OH
Commercial warehouse and distribution floors typically specify F(F) 35-50 and F(L) 25-35. High-rack storage and ASRS systems may require F(F) 60-100+ and F(L) 50-80+ (superflat). Office slabs are typically F(F) 25-35. ASTM E1155 governs measurement. The specification is set by the structural engineer and must be verified by measurement within 72 hours of pour.
Slab thickness is measured by wet-core sampling or pin gauges during the pour, or by coring after cure. The record must include measurement location, measured thickness, specified thickness, and deviation. ACI 117 sets acceptance criteria: average thickness must equal or exceed specified thickness. Sitemark logs thickness measurements and flags locations outside tolerance.
GCs typically require a pour elevation report showing finish floor elevation at column lines, slab edges, and an interior grid. The report shows design elevation, as-poured elevation, and deviation. For elevation-sensitive equipment — dock levelers, conveyors, rack systems — the elevation report is required before equipment installation begins.
Sitemark calculates F(F) flatness and F(L) levelness from a grid of elevation shots taken per the ASTM E1155 measurement grid requirements. The report shows composite F-numbers, a grid map of local F-values, and identifies sections below specification — compatible with what structural engineers and owners request at slab acceptance.
Sitemark gives concrete flatwork contractors the tools to document slab elevations and F-numbers in the field and export professional PDF reports without the Word doc assembly.