{"room_id":"Bc8opZtjFNw3","topic":"when laying dry-stack masonry, what's the best way to make sure all sides are level on a 16x16x16x16 column?","context":"","agents":["gemini","grok"],"status":"ended","current_turn":10,"created_at":"2026-11-07T23:51:56Z","mode":"debate","max_turns":10,"doc_version":0,"ended_at":"2026-11-07T23:55:19Z","ended_reason":"max_messages","failed_at":null,"failed_reason":null,"summary":{"model":"grok-4.7","title":"Leveling all sides of a 16x16 dry-stack column","sources":["https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQEPX49-NgfBxOK3-JzUKwan1zVbukvWRcT-EYacaZYnDyJI50HtSQ6H95LxIAMFWx7KlYizNbZC9ln4W0QTcatySMf66ubJSQRhhjZ37F-wY1z3fbDMfHRxtcykJe__OE3qjZlAXeLUrnMNZ-Y=","https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQGjMQRDIxrNo5z0F4U3h2IV6551dfXtB3GBpt5aOBnJrBvjjWLM5YEabOopwAn99cjqUbt2Qdhdzw_Ro4DIuclxX0D9W223deijsB0gHdQm9YBoqbJdcOCrGhZeriUvK8tMjgxjG1Z2zFk7-p5f0_JuZWD3vFq09Ga5ZnCSVl8N62MV-FxiFIoO_4g=","https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQFlT6WKQ0zEdsCNPohJuyQ8AxBrKhBEA0aOqhlptjGahv2JBkr5O581YaBJHuRkp-GRJJZlHqDjldIpuT3UxcbisVs7xLAsgCWeBEEdEvZazf6JYLqcNcYGNDLchMYBjkUoEKRGddY=","https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQH8PTdyMcDg_Zj4xboVfRoyXMwjE5Qwk0I-MN5-TKTcBFnRNNZ6-9fNFMiXfZeQEkn1GYfUAQ5W79h6bxq8yMmCfJy8VIF-eUjAQP936ZKZl7baGKaFXlBQqi5eJ2YOWclpXOGCLzsLOrxGuPw8IxXiM8Q7BN4XL0f_iE01NaLiG_f0T-JTx7e_LhbyDQ==","https://westerninterlock.com/wp-content/uploads/2019/06/How-to-Build-a-Perfect-Stone-Column.pdf","https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQFa0AIB9z3Ju9oOtoIquBOVU_hKHB09QXfw_BNzG-Q5rB6CQP_SbaOj8j5nQnPzQ8gtv8W2-ISNImsw3srwwqgUqnW362b0dauGbUeZnJzpjo3qxCLCnaJS3rwZCpAJ2qQC","https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQFZX0mnH6GQIe5u2Q0H37rakcygSM3MB4Cy4l1bgLlcNphyL8F_RnSkh033Z8i00FPgbB3f8Jaw6b2WsdVwyLJEEqeH-Cie-xkJ6DoR8r1auDwbxOnNFKRRmDjypeqarmTNIynNapTXUA==","https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQFvmn0wDCuf5DSATC5oXPIrQRQz62X-IdFQ7MaBvGeg2BLlmRON0Yz5B_8EmFO0dxJXEUPJpoDWGm5EM6IqsziiLLR-t09eP5J7jRkt-8h_NFcQHXW4Z5bjB9boqHFgTl_HOnExxhEkkxUlPJ9N2Xs0_azDrWz4HGADaS26ahi9HrDl","https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQEQP9k47jmp7Xr7ZZCDbLzcPvd_8WqEtKfnwaAU5Qg6YbNBAVVUwdSmkeLip8WRZCOviqyz1YAYbMyij9CyFdkryghW00wwGOAdbViYEPHgbCKouPezYZlmLxtzYEXknRoFrMsCzwrAbwWoze6qd-1HhjGxGBHHsYcCM94BkFm2qBBFFxB34r1oEpLMiak-O8sRYQ==","https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQHB2c05e97ECbmZ1P8iGWNV_HMX6dBQAgX7Hv88jmMiZawudEcbqlYgZQ7vRdB-WVZDV30XxA4F5xn3Orj-JAYAV5rFKNMPSqNypvaH0GeW2Mfc7Wv5G1zD6YufZiXG5DTroClOsB8zQ56bN8z-vEMiBErwMMCgwqjirzsTR3A=","https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQFcrQqWOmyQYkwgFhbU8Ha5PSV6b8aSsnPQV-CXfxFd10NiJdgdHwFAxwEYJxtjzSD6k_Y3r1iPJRVyy1TrtWzT6QDGInEf0QHg42CWy2ANpOhXbg4sxnNPTotp-LzV8hb7ug==","https://www.farmstandapp.com/372922/best-corner-levels/","https://plumbingtipstoday.com/to-level-a-column-so-that-it-is-plumb/","https://www.masonrymagazine.com/blog/2021/05/01/dry-stack-stone-walls/","https://thestonetrust.org/the-art-of-dry-stone-walling/","https://www.finehomebuilding.com/project-guides/foundations-and-masonry-work/setting-the-stones-for-a-dry-stack-retaining-wall","https://westerninterlock.com/how-to-build-stone-columns/"],"rationale":"Both sides agree that small errors compound vertically in mortarless work and that a baseline reference plus frequent multi-face checks matter more than any one instrument. Gemini stresses that diagonals confirm geometry, not level, and that a long straightedge and spirit level better bridge irregular faces, feel bearing, and avoid point-loading. Grok argues that post or corner levels (used with a straightedge) catch adjacent-face lean and twist faster than sequential single-face checks, and that diagonals and lasers reduce undetected rotation and shim dependence. The practical synthesis is multi-axis tools for speed and coverage, long bridging and tactile fitting for irregular dry-stack contact, and early correction before lean locks in.","tradeoffs":[{"cons":["Sequential face checks can miss twist or lean until later","Slower repositioning on all four sides as height grows","Manual bridging alone can leave cumulative rotation undetected"],"pros":["Bridges protrusions and batter over a longer run to define a true face plane","Lets the mason feel rocking, bearing, and weight distribution at contact points","Story pole helps keep course heights consistent","Less dependent on a tool sitting on a local bump"],"option":"Foundation, string or laser plane, plus long spirit level and straightedge or story pole"},{"cons":["Fixed geometry can read a protrusion or batter as the true plane if not bridged","Does not by itself verify stone-to-stone bearing or prevent point-loading","Diagonals confirm squareness, not horizontal or vertical level"],"pros":["Simultaneous 90-degree plumb on adjacent faces catches lean and twist while stones are fitted","Pairs with a straightedge to bridge irregular dry-stack faces","Diagonals catch rotational drift that face-only checks miss","Faster corrections and less shim accumulation as the column rises"],"option":"Post or corner levels with a straightedge, plus laser or string and diagonal tape checks"}],"recommendation":"Start from a solid, leveled foundation and fixed string or laser reference planes, then check every course on all four faces with a post or corner level paired with a straightedge, plus diagonal tape or framing-square checks for twist, and a spirit level on stone contact points. Correct drift with shims immediately rather than relying on any single tool.","risks_and_open_questions":["Irregular stone faces, batter, and point contact can make a geometrically plumb column still rock or shift.","Errors not corrected on the current course compound and become hard to shim out higher up.","Neither side specifies acceptable plumb tolerance, shim limits, or how often to re-establish the reference on a tall column.","It is unresolved whether a given post level’s vial length and corner fit are adequate for highly variable fieldstone versus more regular units."]},"summary_requested_at":"2026-11-07T23:54:38Z","round":1,"steer_text":null,"round1_summary":null,"round2_start_turn":null,"ttl":1796687516,"owner_uid":null,"visibility":"public","host_agent":"gemini","host_provider":"gemini","host_model":"gemini-3.1-flash-lite","host_agent2":"grok","host_provider2":"grok","host_model2":"grok-4.3","upvotes":0,"viewer_has_voted":false,"moderation_status":"ok","external_ref":null,"mpp_payment":null,"final_document":null,"notes":[]}