Typical-Wall-Design - General Notes - Retaining Wall Design Load Summary - Typical Spine Wall Footing Step Detail

Oct 24, 2026

Upload by James

General notes and load summary for a typical retaining wall design, specifying limestone reconstitution with minimum dry density and compressive strength requirements, fence post placement in drilled 80mm core holes, and allowable maximum fence height above the wall. Mortar mix proportions and grouting materials are defined, along with site preparation, vegetation removal, backfill selection, and compaction performance using a Perth penetrometer. Control joints, safety fencing, anti-graffiti coating, and building-licence compliance are required, with load cases including surcharge and wind or construction and balustrade point loads.

LanguageEnglish

CategoryResearch & Report

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Reading Time3 min

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General Notes

Fencing Notes

Backfill Compaction Table

Retaining Wall Dimensions Table

Retaining Wall Design Load Summary

Typical Spine Wall Footing Step Detail

# GENERAL NOTES FENCING NOTES 1.ALL BLOCKS MUST BE RECONSTITUTED LIMESTONE HAVING A DRY DENSITY OFF 1.THE FENCE POSTS ARE TO BE PLACED IN 80mm CORE HOLES AND DRILLED AT LEAST 1800 kg/m AND A CRUSHING STRENGTH OF AT LEAST 5.0MPa. 250mm INTO THE THIRD COURSE.THE POSTS SHOULD BE AT 2.35m CENTRES (MAX.)WITH A MAXIMUM FENCE HEIGHT OF 1.8m ABOVE TOP OF WALL. 2.MORTAR TO BE 1:1:6(CEMENT:LIME:SAND).ALL JOINTS T0 BE FULLY 2.THE FENCE POSTS ARE TO BE PLACED CENTRAL TO THE TOP ROW OF BLOCKS MORTARED IN PLAN.AN APPROVED NON SHRINK,FLOWABLE CONSTRUCTION GROUT SUCH 3.ALL TOPSOIL,VEGETATION AND DELETERIOUS MATTER SHALL BE REMOVED AS CONBEXTRA GP FROM PARCHEM AND MASTERFLOW 500 FROM MBT,MUST BE USED TO ANCHOR THE FENCE POSTS INTO THE CORE HOLES. FROM THE FOUNDATION AREA. 4.ALL BACKFILLING SHALL BE CARRIED OUT USING MATERIAL WHICH SHALL 3.WHERE METAL FENCING SURROUNDS TRANSFORMER OR SWITCHGEAR SITE, GENERALLY BE SANDY IN NATURE AND FREE FROM LARGE PIECES OF ROCK TO FENCING TO BE INSTALLED A MINIMUM 0F 1.25m FROM THE SITE BOUNDARY THE EXTENT THAT THE MATERIAL CAN BE COMPACTED USING A VIBRATING PLATE COMPACTOR TO MEET THE REQUIREMENTS OF THE SPECIFICATION. | BACKFILL COMPACTION TABLE米 | | | --- | --- | | PENETROMETER
DEPTH (mm) | MINIMUM ACCEPTABLE No
OF BLOWS PER 300mm | | 150 T0450 | 8 | | 450 T0750 | 10 | | 750 T01050 | 11 | | 1050 T01350 | 12 | | 1350 T01650 | 13 | | 1650 T01950 | 13 | | 1950 T02250 | 14 | | 2250 T02550 | 14 | | 2550 T02850 | 15 | 5.IN ALL CASES THE BACKFILL MATERIAL SHALL BE SELECTED SUCH THAT,ONCE COMPACTED,THE STANDARD OF COMPACTION CAN BE MEASURED USING A STANDARD PERTH PENETROMETER. 6.COMPACTION OF THE BACKFILL MATERIAL TO THE FRONT AND BACK OF THE WALL SHALL BE IN ACCORDANCE WITH THE BACKFILL COMPACTION TABLE SHOWN ON THIS DRAWING.INSITU OR PLACED MATERIAL BENEATH WALL TO BE COMPACTED TO 95%MODIFIED MAX DRY DENSITY. 7.PRIOR TO PRACTICAL COMPLETION THE CONTRACTOR SHALL PROVIDE WRITTEN CERTIFICATION FROM A PRACTICING STRUCTURAL ENGINEER THAT THE WALL CONSTRUCTION HAS BEEN CARRIED OUT IN ACCORDANCE WITH THIS DRAWING, THE SPECIFICATION AND ANY REQUIREMENTS SHOWN ON THE BUILDING LICENCE. 8.CONTROL JOINTS(CJ)SHALL BE CONSTRUCTED WITHIN THE RETAINING WALL 米AN ALTERNATIVE SITE SPECIFIC BACKFILL COMPACTION WHERE NOTED BELOW (REFER RETAINING WALL PLAN FOR LOCATIONS): TABLE MAY BE ACCEPTABLE TO THE SUPERINTENDENT IF IT CAN BE DEMONSTRATED THAT COMPACTION EQUIVALENT TO a.WHERE THE ANGLE BETWEEN FACES OF TWO WALLS IS 90°.CJIS TO BE 95%MODIFIED MAXIMUM DRY DENSITY IS ACHIEVED. LOCATED ON ONE SIDE OF THE CHANGE IN DIRECTION,AT A DISTANCE AWAY FROM THE DIRECTION CHANGE EQUAL TO THE BASE WIDTH OF THE WALL"W". | RETAINING WALL DIMENSIONS
FOR WALLS RETAINED EFFECTIVE HEIGHT
741mm T04050mm HIGH | | | | --- | --- | --- | | COURSE
No. | HEIGHT“H” | MIN.WIDTH
AT COURSE“W” | | 1 | 350 | 350 | | 2 | 720 | 720 | | 3 | 1090 | 905 | | 4 | 1460 | 1090 | | 5 | 1830 | 1275 | | 6 | 2200 | 1460 | | 7 | 2570 | 1645 | | 8 | 2940 | 2015 | | 9 | 3310 | 2385 | | 10 | 3680 | 2570 | | 11 | 4050 | 2755 | | 12 | 4420 | 3040 | b.WHERE THE STRAIGHT LENGTH OF ANY GIVEN WALL EXCEEDS 40m IN WHICH CASE THE WALL SHALL HAVE CONTROL JOINTS SPACED AT DISTANCES NO GREATER THAN 40m.WHERE POSSIBLE THESE SHALL BE PLACED AT ALLOTMENT BOUNDARIES COINCIDING WITH THE LOWER PROPERTY. c.AT CORNER TRUNCATIONS,WHERE BLOCKS ARE NOT CROSS-BONDED d.AT SPINE WALL STEPS 9.CONTROL JOINTS SHALL BE 15mm WIDE AND FILLED WITH Aφ25 F0AM BACKING ROD (TOP,FRONT &BACK)COVERED WITH A 25mm DEEP MASTIC OF COLOUR TO MATCH WALL MORTAR(FRONT AND TOP ONLY).JOINTS ARE TO EXTEND THROUGH WALL AND ANY MASONRY FENCES.A 1000mm WIDE STRIP OF BIDUM A14 CLOTH IS TO BE DRAPED OVER THE REAR OF THE JOINT. 10.CONTRACTOR TO INSTALL A SAFETY FENCE TO ALL

FAQs

What are the key requirements for fence post installation in the wall cores?

Fence posts must be placed in drilled 80mm core holes and drilled at least 250mm into the third course. Posts should be at 2.35m centres (max) with a maximum fence height of 1.8m above the top of the wall, using an approved non-shrink flowable construction grout to anchor posts.

How is backfill compaction specified and verified?

Backfill material must be selected so the standard of compaction can be measured with a standard Perth penetrometer. Compaction is to meet the backfill compaction table on the drawing, and in-situ or placed material beneath the wall must be compacted to 95% modified maximum dry density.

What construction controls and safety requirements are stated before and during works?

Prior to practical completion, the contractor must provide written certification from a practicing structural engineer confirming the wall construction follows the drawing, specification, and building licence requirements. Control joints must be constructed and filled to the stated dimensions and materials, and safety fencing with temporary warning signs is required for retaining walls higher than 1.0m.

Oct 24, 2026

Upload by James